diff --git a/Zend/zend_API.c b/Zend/zend_API.c
index 0ecbe0e278d..d6350502ff2 100644
--- a/Zend/zend_API.c
+++ b/Zend/zend_API.c
@@ -183,6 +183,8 @@ ZEND_API char *zend_get_type_by_const(int type) /* {{{ */
 			return "null";
 		case IS_CALLABLE:
 			return "callable";
+		case IS_ITERABLE:
+			return "iterable";
 		case IS_ARRAY:
 			return "array";
 		case IS_VOID: