diff --git a/dlls/ntdll/tests/virtual.c b/dlls/ntdll/tests/virtual.c
index 2c5e1d6ecc3..6831fe3c522 100644
--- a/dlls/ntdll/tests/virtual.c
+++ b/dlls/ntdll/tests/virtual.c
@@ -584,6 +584,48 @@ static void test_NtAllocateVirtualMemoryEx_address_requirements(void)
     size = 0;
     status = NtFreeVirtualMemory(NtCurrentProcess(), &addr, &size, MEM_RELEASE);
     ok(!status, "Unexpected status %08lx.\n", status);
+
+    a.HighestEndingAddress = (void *)(0x20001000 - 1);
+    a.Alignment = 0x20000000;
+    size = 0x2000;
+    addr = NULL;
+    status = pNtAllocateVirtualMemoryEx(NtCurrentProcess(), &addr, &size, MEM_RESERVE,
+                                        PAGE_EXECUTE_READWRITE, ext, 1);
+    ok(status == STATUS_NO_MEMORY, "Unexpected status %08lx.\n", status);
+
+    a.HighestEndingAddress = NULL;
+    a.Alignment = 0x8000;
+    size = 0x1000;
+    addr = NULL;
+    status = pNtAllocateVirtualMemoryEx(NtCurrentProcess(), &addr, &size, MEM_RESERVE,
+                                        PAGE_EXECUTE_READWRITE, ext, 1);
+    ok(status == STATUS_INVALID_PARAMETER, "Unexpected status %08lx.\n", status);
+
+    a.Alignment = 0x30000;
+    size = 0x1000;
+    addr = NULL;
+    status = pNtAllocateVirtualMemoryEx(NtCurrentProcess(), &addr, &size, MEM_RESERVE,
+                                        PAGE_EXECUTE_READWRITE, ext, 1);
+    ok(status == STATUS_INVALID_PARAMETER, "Unexpected status %08lx.\n", status);
+
+    a.Alignment = 0x40000;
+    size = 0x1000;
+    addr = NULL;
+    status = pNtAllocateVirtualMemoryEx(NtCurrentProcess(), &addr, &size, MEM_RESERVE,
+                                        PAGE_EXECUTE_READWRITE, ext, 1);
+    ok(!status, "Unexpected status %08lx.\n", status);
+    ok(!((ULONG_PTR)addr & 0x3ffff), "Unexpected addr %p.\n", addr);
+    status = pNtAllocateVirtualMemoryEx(NtCurrentProcess(), &addr, &size, MEM_COMMIT,
+                                        PAGE_EXECUTE_READWRITE, ext, 1);
+    ok(status == STATUS_INVALID_PARAMETER, "Unexpected status %08lx.\n", status);
+
+    size = 0;
+    status = NtFreeVirtualMemory(NtCurrentProcess(), &addr, &size, MEM_RELEASE);
+    ok(!status, "Unexpected status %08lx.\n", status);
+
+    status = pNtAllocateVirtualMemoryEx(NtCurrentProcess(), &addr, &size, MEM_RESERVE,
+                                        PAGE_EXECUTE_READWRITE, ext, 1);
+    ok(status == STATUS_INVALID_PARAMETER, "Unexpected status %08lx.\n", status);
 }
 
 struct test_stack_size_thread_args
diff --git a/dlls/ntdll/unix/server.c b/dlls/ntdll/unix/server.c
index b7d8733f2bc..07d9c8d3acd 100644
--- a/dlls/ntdll/unix/server.c
+++ b/dlls/ntdll/unix/server.c
@@ -358,7 +358,7 @@ static NTSTATUS invoke_user_apc( CONTEXT *context, const user_apc_t *apc, NTSTAT
  */
 static void invoke_system_apc( const apc_call_t *call, apc_result_t *result, BOOL self )
 {
-    SIZE_T size, bits, limit;
+    SIZE_T size, bits, limit, align;
     void *addr;
 
     memset( result, 0, sizeof(*result) );
@@ -416,9 +416,12 @@ static void invoke_system_apc( const apc_call_t *call, apc_result_t *result, BOO
         addr = wine_server_get_ptr( call->virtual_alloc_ex.addr );
         size = call->virtual_alloc_ex.size;
         limit = min( (ULONG_PTR)sbi.HighestUserAddress, call->virtual_alloc_ex.limit );
-        if ((ULONG_PTR)addr == call->virtual_alloc_ex.addr && size == call->virtual_alloc_ex.size)
+        align = call->virtual_alloc_ex.align;
+        if ((ULONG_PTR)addr == call->virtual_alloc_ex.addr && size == call->virtual_alloc_ex.size
+            && align == call->virtual_alloc_ex.align)
         {
             r.HighestEndingAddress = (void *)limit;
+            r.Alignment = align;
             result->virtual_alloc_ex.status = NtAllocateVirtualMemoryEx( NtCurrentProcess(), &addr, &size,
                                                                          call->virtual_alloc_ex.op_type,
                                                                          call->virtual_alloc_ex.prot, &ext, 1 );
diff --git a/dlls/ntdll/unix/virtual.c b/dlls/ntdll/unix/virtual.c
index b1caaff8a13..3367913d4e2 100644
--- a/dlls/ntdll/unix/virtual.c
+++ b/dlls/ntdll/unix/virtual.c
@@ -3738,7 +3738,7 @@ void virtual_set_large_address_space(void)
  * NtAllocateVirtualMemory[Ex] implementation.
  */
 static NTSTATUS allocate_virtual_memory( void **ret, SIZE_T *size_ptr, ULONG type, ULONG protect,
-                                         ULONG_PTR limit )
+                                         ULONG_PTR limit, ULONG_PTR align )
 {
     void *base;
     unsigned int vprot;
@@ -3800,7 +3800,7 @@ static NTSTATUS allocate_virtual_memory( void **ret, SIZE_T *size_ptr, ULONG typ
             if (vprot & VPROT_WRITECOPY) status = STATUS_INVALID_PAGE_PROTECTION;
             else if (is_dos_memory) status = allocate_dos_memory( &view, vprot );
             else status = map_view( &view, base, size, type & MEM_TOP_DOWN, vprot, limit,
-                                    granularity_mask );
+                                    align ? align - 1 : granularity_mask );
 
             if (status == STATUS_SUCCESS) base = view->base;
         }
@@ -3888,7 +3888,7 @@ NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG_PTR z
     else
         limit = 0;
 
-    return allocate_virtual_memory( ret, size_ptr, type, protect, limit );
+    return allocate_virtual_memory( ret, size_ptr, type, protect, limit, 0 );
 }
 
 
@@ -3901,6 +3901,7 @@ NTSTATUS WINAPI NtAllocateVirtualMemoryEx( HANDLE process, PVOID *ret, SIZE_T *s
                                            ULONG count )
 {
     ULONG_PTR limit = 0;
+    ULONG_PTR align = 0;
 
     TRACE("%p %p %08lx %x %08x %p %u\n", process, *ret, *size_ptr, type, protect, parameters, count );
 
@@ -3930,17 +3931,27 @@ NTSTATUS WINAPI NtAllocateVirtualMemoryEx( HANDLE process, PVOID *ret, SIZE_T *s
             }
             r = (MEM_ADDRESS_REQUIREMENTS *)parameters[i].Pointer;
 
-            if (r->LowestStartingAddress || r->Alignment)
+            if (r->LowestStartingAddress)
                 FIXME( "Not supported requirements LowestStartingAddress %p, Alignment %p.\n",
                        r->LowestStartingAddress, (void *)r->Alignment );
 
+            if (r->Alignment)
+            {
+                if (*ret || (r->Alignment & (r->Alignment - 1)) || r->Alignment - 1 < granularity_mask)
+                {
+                    WARN( "Invalid alignment %lu.\n", r->Alignment );
+                    return STATUS_INVALID_PARAMETER;
+                }
+                align = r->Alignment;
+            }
+
             limit = (ULONG_PTR)r->HighestEndingAddress;
             if (limit && (*ret || limit > (ULONG_PTR)user_space_limit || ((limit + 1) & (page_mask - 1))))
             {
                 WARN( "Invalid limit %p.\n", r->HighestEndingAddress);
                 return STATUS_INVALID_PARAMETER;
             }
-            TRACE( "limit %p.\n", (void *)limit );
+            TRACE( "limit %p, align %p.\n", (void *)limit, (void *)align );
         }
     }
 
@@ -3958,6 +3969,7 @@ NTSTATUS WINAPI NtAllocateVirtualMemoryEx( HANDLE process, PVOID *ret, SIZE_T *s
         call.virtual_alloc_ex.addr         = wine_server_client_ptr( *ret );
         call.virtual_alloc_ex.size         = *size_ptr;
         call.virtual_alloc_ex.limit        = limit;
+        call.virtual_alloc_ex.align        = align;
         call.virtual_alloc_ex.op_type      = type;
         call.virtual_alloc_ex.prot         = protect;
         status = server_queue_process_apc( process, &call, &result );
@@ -3971,7 +3983,7 @@ NTSTATUS WINAPI NtAllocateVirtualMemoryEx( HANDLE process, PVOID *ret, SIZE_T *s
         return result.virtual_alloc_ex.status;
     }
 
-    return allocate_virtual_memory( ret, size_ptr, type, protect, limit );
+    return allocate_virtual_memory( ret, size_ptr, type, protect, limit, align );
 }
 
 
diff --git a/include/wine/server_protocol.h b/include/wine/server_protocol.h
index 58dd870a6ce..472c0ea709d 100644
--- a/include/wine/server_protocol.h
+++ b/include/wine/server_protocol.h
@@ -526,6 +526,7 @@ typedef union
         client_ptr_t     addr;
         mem_size_t       size;
         mem_size_t       limit;
+        mem_size_t       align;
         unsigned int     prot;
     } virtual_alloc_ex;
     struct
@@ -6355,7 +6356,7 @@ union generic_reply
 
 /* ### protocol_version begin ### */
 
-#define SERVER_PROTOCOL_VERSION 757
+#define SERVER_PROTOCOL_VERSION 758
 
 /* ### protocol_version end ### */
 
diff --git a/server/protocol.def b/server/protocol.def
index 06977c29054..8c2fbeb4afe 100644
--- a/server/protocol.def
+++ b/server/protocol.def
@@ -542,6 +542,7 @@ typedef union
         client_ptr_t     addr;         /* requested address */
         mem_size_t       size;         /* allocation size */
         mem_size_t       limit;        /* allocation address limit */
+        mem_size_t       align;        /* allocation alignment */
         unsigned int     prot;         /* memory protection flags */
     } virtual_alloc_ex;
     struct
diff --git a/server/trace.c b/server/trace.c
index 560a1b617ea..a0076d5449b 100644
--- a/server/trace.c
+++ b/server/trace.c
@@ -193,6 +193,7 @@ static void dump_apc_call( const char *prefix, const apc_call_t *call )
         dump_uint64( "APC_VIRTUAL_ALLOC,addr==", &call->virtual_alloc_ex.addr );
         dump_uint64( ",size=", &call->virtual_alloc_ex.size );
         dump_uint64( ",limit=", &call->virtual_alloc_ex.limit );
+        dump_uint64( ",align=", &call->virtual_alloc_ex.align );
         fprintf( stderr, ",op_type=%x,prot=%x", call->virtual_alloc_ex.op_type, call->virtual_alloc_ex.prot );
         break;
     case APC_VIRTUAL_FREE: