diff --git a/src/TwigTweakExtension.php b/src/TwigTweakExtension.php
index f642aeb..109a6e8 100644
--- a/src/TwigTweakExtension.php
+++ b/src/TwigTweakExtension.php
@@ -425,9 +425,9 @@ class TwigTweakExtension extends AbstractExtension {
         // Drupal core expects exactly three parameters:
         // [$group, $route_parameters_raw, $metadata_raw] = explode(':', $context);
         // in _contextual_id_to_links($id):
-        $contextParamCount = substr_count($context, ':');
+        $contextParamCount = substr_count($context, ':')+1;
         if ($contextParamCount !== 3) {
-          trigger_error("Wrong {{ drupal_contextual_links() }} parameter given. 3 parameters expected separated by colon (\":\"), but {$contextParamCount+1} given in \"{$id}\"", E_USER_WARNING);
+          trigger_error("Wrong {{ drupal_contextual_links() }} parameter given. 3 parameters expected separated by colon (\":\"), but {$contextParamCount} given in \"{$id}\"", E_USER_WARNING);
         }
       }