diff --git a/Main/SOGo.m b/Main/SOGo.m
index 289974af5..606da8ba9 100644
--- a/Main/SOGo.m
+++ b/Main/SOGo.m
@@ -483,7 +483,7 @@ static BOOL debugLeaks;
 
 - (void) checkIfDaemonHasToBeShutdown
 {
-  unsigned int vmem;
+  unsigned long long vmem;
 
   if (vMemSizeLimit > 0)
     {