diff --git a/src/base/condcodes.hh b/src/base/condcodes.hh
index efff12dc8..98defdb70 100644
--- a/src/base/condcodes.hh
+++ b/src/base/condcodes.hh
@@ -54,7 +54,7 @@ inline
 bool
 findOverflow(int width, uint64_t dest, uint64_t src1, uint64_t src2) {
     int shift = width - 1;
-    return ((src1 ^ ~src2) & (src1 ^ dest)) & (1 << shift);
+    return ((src1 ^ ~src2) & (src1 ^ dest)) & (1ULL << shift);
 }
 
 /**