diff --git a/reactos/subsys/win32k/tests/stubs.xml b/reactos/subsys/win32k/tests/stubs.xml
index 2a1c7af4c95..3fb70ed726c 100644
--- a/reactos/subsys/win32k/tests/stubs.xml
+++ b/reactos/subsys/win32k/tests/stubs.xml
@@ -151,6 +151,8 @@
 	<symbol>PsSetThreadWin32Thread@8</symbol>
 	<symbol>ProbeForRead@12</symbol>
 	<symbol>ProbeForWrite@12</symbol>
+	<symbol>@ExEnterCriticalRegionAndAcquireFastMutexUnsafe@4</symbol>
+	<symbol>@ExReleaseFastMutexUnsafeAndLeaveCriticalRegion@4</symbol>
 </component>
 <component name="freetype.dll">
 	<symbol>FT_Init_FreeType</symbol>