diff --git a/package_linter.py b/package_linter.py
index e077a6e..89c5d61 100755
--- a/package_linter.py
+++ b/package_linter.py
@@ -1435,7 +1435,7 @@ class Configurations(TestSuite):
             ):
                 continue
 
-            cmd = 'grep -q -IhEro "location ~ __PATH__\" %s' % filename
+            cmd = 'grep -q -IhEro "location ~ __PATH__" %s' % filename
 
             if os.system(cmd) != 0:
                 yield Warning(