diff --git a/utils/intrusive-array.hh b/utils/intrusive-array.hh
index 8d32979295..c7b0b7b3aa 100644
--- a/utils/intrusive-array.hh
+++ b/utils/intrusive-array.hh
@@ -271,7 +271,7 @@ public:
         int i = 0;
 
         do {
-            int x = cmp(_data[i].object, val);
+            auto x = cmp(_data[i].object, val);
             if (x >= 0) {
                 match = (x == 0);
                 break;