diff --git a/Extractor/ApiDocExtractor.php b/Extractor/ApiDocExtractor.php
index e338fe9..c8b0021 100644
--- a/Extractor/ApiDocExtractor.php
+++ b/Extractor/ApiDocExtractor.php
@@ -322,7 +322,7 @@ class ApiDocExtractor
             }
         }
 
-        $regexp = '{(\w*) *\$%s *(.*)}i';
+        $regexp = '{(\w*) *\$%s\b *(.*)}i';
         foreach ($route->compile()->getVariables() as $var) {
             $found = false;
             foreach ($paramDocs as $paramDoc) {