diff --git a/sdk/lib/rtl/heap.c b/sdk/lib/rtl/heap.c
index 847051df44c..61e7748d25f 100644
--- a/sdk/lib/rtl/heap.c
+++ b/sdk/lib/rtl/heap.c
@@ -2308,6 +2308,7 @@ BOOLEAN NTAPI RtlFreeHeap(
     }
     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
     {
+        __debugbreak();
         /* The pointer was invalid */
         DPRINT1("HEAP: Trying to free an invalid address %p!\n", Ptr);
         RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_INVALID_PARAMETER);