diff --git a/uppsrc/Core/heaputil.cpp b/uppsrc/Core/heaputil.cpp
index 524080ab4..b55dcc01a 100644
--- a/uppsrc/Core/heaputil.cpp
+++ b/uppsrc/Core/heaputil.cpp
@@ -94,7 +94,7 @@ void *SysAllocRaw(size_t size, size_t reqsize)
 	}
 	if(!ptr)
 		OutOfMemoryPanic(size/*reqsize*/);
-	sKB += rsz;
+	sKB += (int)rsz;
 	DoPeakProfile();
 	return ptr;
 }