diff --git a/dlls/user32/user32.spec b/dlls/user32/user32.spec
index a8bbe8344b8..5cc0f5524f3 100644
--- a/dlls/user32/user32.spec
+++ b/dlls/user32/user32.spec
@@ -697,6 +697,8 @@
 @ stub ShowStartGlass
 @ stdcall ShowWindow(long long)
 @ stdcall ShowWindowAsync(long long)
+@ stdcall ShutdownBlockReasonCreate(long wstr)
+@ stdcall ShutdownBlockReasonDestroy(long)
 # @ stub SoftModalMessageBox
 @ stdcall SubtractRect(ptr ptr ptr)
 @ stdcall SwapMouseButton(long)
diff --git a/dlls/user32/user_main.c b/dlls/user32/user_main.c
index 12764e664c8..718abe0e834 100644
--- a/dlls/user32/user_main.c
+++ b/dlls/user32/user_main.c
@@ -409,3 +409,23 @@ int WINAPI RegisterServicesProcess(DWORD ServicesProcessId)
     FIXME("(0x%x): stub\n", ServicesProcessId);
     return 0;
 }
+
+/***********************************************************************
+ *		ShutdownBlockReasonCreate (USER32.@)
+ */
+BOOL WINAPI ShutdownBlockReasonCreate(HWND hwnd, LPCWSTR reason)
+{
+    FIXME("(%p, %s): stub\n", hwnd, debugstr_w(reason));
+    SetLastError( ERROR_CALL_NOT_IMPLEMENTED );
+    return FALSE;
+}
+
+/***********************************************************************
+ *		ShutdownBlockReasonDestroy (USER32.@)
+ */
+BOOL WINAPI ShutdownBlockReasonDestroy(HWND hwnd)
+{
+    FIXME("(%p): stub\n", hwnd);
+    SetLastError( ERROR_CALL_NOT_IMPLEMENTED );
+    return FALSE;
+}
diff --git a/include/winuser.h b/include/winuser.h
index e9804a93e39..118aa73a663 100644
--- a/include/winuser.h
+++ b/include/winuser.h
@@ -3992,6 +3992,8 @@ WINUSERAPI BOOL        WINAPI ShowScrollBar(HWND,INT,BOOL);
 WINUSERAPI BOOL        WINAPI ShowOwnedPopups(HWND,BOOL);
 WINUSERAPI BOOL        WINAPI ShowWindow(HWND,INT);
 WINUSERAPI BOOL        WINAPI ShowWindowAsync(HWND,INT);
+WINUSERAPI BOOL        WINAPI ShutdownBlockReasonCreate(HWND,LPCWSTR);
+WINUSERAPI BOOL        WINAPI ShutdownBlockReasonDestroy(HWND);
 WINUSERAPI BOOL        WINAPI SubtractRect(LPRECT,const RECT*,const RECT*);
 WINUSERAPI BOOL        WINAPI SwapMouseButton(BOOL);
 WINUSERAPI BOOL        WINAPI SwitchDesktop(HDESK);