diff --git a/src/Composer/Autoload/ClassMapGenerator.php b/src/Composer/Autoload/ClassMapGenerator.php
index 1ecf96bfe..c3a3a07d8 100644
--- a/src/Composer/Autoload/ClassMapGenerator.php
+++ b/src/Composer/Autoload/ClassMapGenerator.php
@@ -173,7 +173,7 @@ class ClassMapGenerator
             }
         }
         // strip non-php blocks in the file
-        $contents = preg_replace('{\?>.+<\?}s', '?><?', $contents);
+        $contents = preg_replace('{\?>.+?<\?}s', '?><?', $contents);
         // strip trailing non-php code if needed
         $pos = strrpos($contents, '?>');
         if (false !== $pos && false === strpos(substr($contents, $pos), '<?')) {