diff --git a/rules/Php71/Rector/FuncCall/CountOnNullRector.php b/rules/Php71/Rector/FuncCall/CountOnNullRector.php
index 8423097c025..446c145b226 100644
--- a/rules/Php71/Rector/FuncCall/CountOnNullRector.php
+++ b/rules/Php71/Rector/FuncCall/CountOnNullRector.php
@@ -133,6 +133,10 @@ private function shouldSkip(FuncCall $funcCall): bool
             return true;
         }
 
+        if (! isset($funcCall->args[0])) {
+            return true;
+        }
+
         if ($funcCall->args[0]->value instanceof ClassConstFetch) {
             return true;
         }
@@ -149,10 +153,6 @@ private function shouldSkip(FuncCall $funcCall): bool
             return true;
         }
 
-        if (! isset($funcCall->args[0])) {
-            return true;
-        }
-
         // skip node in trait, as impossible to analyse
         $classLike = $funcCall->getAttribute(AttributeKey::CLASS_NODE);
         return $classLike instanceof Trait_;