diff --git a/routing/conditions.rst b/routing/conditions.rst
index 2a375990fac..3b033262dd9 100644
--- a/routing/conditions.rst
+++ b/routing/conditions.rst
@@ -1,5 +1,5 @@
 .. index::
-    :single: Routing; Conditions
+    single: Routing; Conditions
 
 How to Restrict Route Matching through Conditions
 =================================================