diff --git a/ext/opcache/Optimizer/optimize_func_calls.c b/ext/opcache/Optimizer/optimize_func_calls.c
index 9861930524c..14f82556537 100644
--- a/ext/opcache/Optimizer/optimize_func_calls.c
+++ b/ext/opcache/Optimizer/optimize_func_calls.c
@@ -126,7 +126,7 @@ static void optimize_func_calls(zend_op_array *op_array, zend_persistent_script
 					call_stack[call - 1].opline = NULL;
 				}
 				break;
-#if ZEND_EXTENSION_API_NO >= PHP_5_6_X_API_NO
+#if ZEND_EXTENSION_API_NO > PHP_5_5_X_API_NO
 			case ZEND_SEND_UNPACK:
 				call_stack[call - 1].func = NULL;
 				call_stack[call - 1].opline = NULL;