diff --git a/src/module_wrap.cc b/src/module_wrap.cc
index 2368279d8e640a..16d76057eec8d0 100644
--- a/src/module_wrap.cc
+++ b/src/module_wrap.cc
@@ -951,7 +951,7 @@ bool IsArrayIndex(Environment* env, Local<Value> p) {
   if (!n->ToInteger(context).ToLocal(&cmp_integer)) {
     return false;
   }
-  return n_dbl > 0 && n_dbl < (2 ^ 32) - 1;
+  return n_dbl > 0 && n_dbl < (1LL << 32) - 1;
 }
 
 Maybe<URL> ResolveExportsTarget(Environment* env,