diff --git a/dlls/fltmgr.sys/fltmgr.sys.spec b/dlls/fltmgr.sys/fltmgr.sys.spec
index 7b1ba2983c2..39ce6798178 100644
--- a/dlls/fltmgr.sys/fltmgr.sys.spec
+++ b/dlls/fltmgr.sys/fltmgr.sys.spec
@@ -1,4 +1,4 @@
-@ stub FltAcquirePushLockExclusive
+@ stdcall FltAcquirePushLockExclusive(ptr)
 @ stub FltAcquirePushLockShared
 @ stub FltAcquireResourceExclusive
 @ stub FltAcquireResourceShared
@@ -40,7 +40,7 @@
 @ stub FltDeleteContext
 @ stub FltDeleteFileContext
 @ stub FltDeleteInstanceContext
-@ stub FltDeletePushLock
+@ stdcall FltDeletePushLock(ptr)
 @ stub FltDeleteStreamContext
 @ stub FltDeleteStreamHandleContext
 @ stub FltDeleteVolumeContext
@@ -133,7 +133,7 @@
 @ stub FltReleaseContext
 @ stub FltReleaseContexts
 @ stub FltReleaseFileNameInformation
-@ stub FltReleasePushLock
+@ stdcall FltReleasePushLock(ptr)
 @ stub FltReleaseResource
 @ stub FltRequestOperationStatusCallback
 @ stub FltRetainSwappedBufferMdlAddress
diff --git a/dlls/fltmgr.sys/main.c b/dlls/fltmgr.sys/main.c
index 16ca2845c26..a1b81e5a893 100644
--- a/dlls/fltmgr.sys/main.c
+++ b/dlls/fltmgr.sys/main.c
@@ -43,6 +43,21 @@ void WINAPI FltInitializePushLock( EX_PUSH_LOCK *lock )
     FIXME( "(%p): stub\n", lock );
 }
 
+void WINAPI FltDeletePushLock( EX_PUSH_LOCK *lock )
+{
+    FIXME( "(%p): stub\n", lock );
+}
+
+void WINAPI FltAcquirePushLockExclusive( EX_PUSH_LOCK *lock )
+{
+    FIXME( "(%p): stub\n", lock );
+}
+
+void WINAPI FltReleasePushLock( EX_PUSH_LOCK *lock )
+{
+    FIXME( "(%p): stub\n", lock );
+}
+
 NTSTATUS WINAPI FltRegisterFilter( PDRIVER_OBJECT driver, const FLT_REGISTRATION *reg, PFLT_FILTER *filter )
 {
     FIXME( "(%p,%p,%p): stub\n", driver, reg, filter );