--- a/quickjs.c
+++ b/quickjs.c
@@ -10771,7 +10771,7 @@ static int JS_ToInt64SatFree(JSContext *
             } else {
                 if (d < INT64_MIN)
                     *pres = INT64_MIN;
-                else if (d > INT64_MAX)
+                else if (d > (double)INT64_MAX)
                     *pres = INT64_MAX;
                 else
                     *pres = (int64_t)d;
@@ -55329,7 +55329,7 @@ static JSValue js_atomics_wait(JSContext
     }
     if (JS_ToFloat64(ctx, &d, argv[3]))
         return JS_EXCEPTION;
-    if (isnan(d) || d > INT64_MAX)
+    if (isnan(d) || d > (double)INT64_MAX)
         timeout = INT64_MAX;
     else if (d < 0)
         timeout = 0;