diff --git a/ext/gmp/gmp.c b/ext/gmp/gmp.c
index 863a529631e..dc2b6497463 100644
--- a/ext/gmp/gmp.c
+++ b/ext/gmp/gmp.c
@@ -2080,8 +2080,8 @@ ZEND_FUNCTION(gmp_setbit)
 		php_error_docref(NULL, E_WARNING, "Index must be greater than or equal to zero");
 		RETURN_FALSE;
 	}
-    if (index / GMP_NUMB_BITS >= INT_MAX ) {
-        php_error_docref(NULL, E_WARNING, "Index must be less than %ld * %ld", INT_MAX, GMP_NUMB_BITS);
+    if (index / GMP_NUMB_BITS >= INT_MAX) {
+        php_error_docref(NULL, E_WARNING, "Index must be less than %d * %d", INT_MAX, GMP_NUMB_BITS);
         RETURN_FALSE;
     }