diff --git a/reactos/subsystems/win32/win32k/eng/semaphor.c b/reactos/subsystems/win32/win32k/eng/semaphor.c
index 8fa5bda527f..f0f6242ded7 100644
--- a/reactos/subsystems/win32/win32k/eng/semaphor.c
+++ b/reactos/subsystems/win32/win32k/eng/semaphor.c
@@ -57,6 +57,9 @@ EngDeleteSemaphore ( IN HSEMAPHORE hsem )
 {
   // www.osr.com/ddk/graphics/gdifncs_13c7.htm
   ASSERT ( hsem );
+
+  ExDeleteResourceLite((PERESOURCE)hsem);
+
   ExFreePool ( (PVOID)hsem );
 }