diff --git a/src/FileProcessor/TypoScript/Conditions/CompatVersionConditionMatcher.php b/src/FileProcessor/TypoScript/Conditions/CompatVersionConditionMatcher.php
index 5b72ca15e..29ed451de 100644
--- a/src/FileProcessor/TypoScript/Conditions/CompatVersionConditionMatcher.php
+++ b/src/FileProcessor/TypoScript/Conditions/CompatVersionConditionMatcher.php
@@ -23,7 +23,7 @@ public function change(string $condition): ?string
             $matches
         );
 
-        if (! is_string($matches['value'])) {
+        if (! isset($matches['value'])) {
             return $condition;
         }