diff --git a/docs/usage/configuration-options.md b/docs/usage/configuration-options.md
index 5f9c72908540757223c0b7227a7b61a23aacb800..ba8174893dfc8fa1ed385d31429a73ba89a6f9e8 100644
--- a/docs/usage/configuration-options.md
+++ b/docs/usage/configuration-options.md
@@ -335,7 +335,7 @@ Finally, there are cases where Renovate's default `fileMatch` is good, but you m
 ```json
 {
   "dockerfile": {
-    "fileMatch": ["^ACTUALLY_A_DOCKERFILE.template$"]
+    "fileMatch": ["^ACTUALLY_A_DOCKERFILE\\.template$"]
   }
 }
 ```