diff --git a/SC1144.md b/SC1144.md
index 1588ad1..b19535a 100644
--- a/SC1144.md
+++ b/SC1144.md
@@ -1,4 +1,4 @@
-## external-sources can only be enabled in .shellcheckrc, not in individual files.
+## `external-sources` can only be enabled in .shellcheckrc, not in individual files.
 
 ### Problematic code: