diff --git a/reactos/dll/ntdll/csr/connect.c b/reactos/dll/ntdll/csr/connect.c
index cef68d9a60c..3a4672e44ab 100644
--- a/reactos/dll/ntdll/csr/connect.c
+++ b/reactos/dll/ntdll/csr/connect.c
@@ -255,7 +255,7 @@ CsrClientConnectToServer(IN PWSTR ObjectDirectory,
         CsrPortHeap = RtlGetProcessHeap();
 
         /* Tell the caller we're inside the server */
-        *ServerToServerCall = InsideCsrProcess;
+        if (ServerToServerCall) *ServerToServerCall = InsideCsrProcess;
         return STATUS_SUCCESS;
     }