diff --git a/Makefile b/Makefile
index 4adb261..46cf312 100644
--- a/Makefile
+++ b/Makefile
@@ -149,7 +149,7 @@ size: $(PROGRAM).elf
 
 config.h: config.h.dist
 	@echo "Please review config.h, as config.h.dist is more recent."
-	@echo "To view the differences, run: diff -bBEu config.h config.h.dist
+	@echo "To view the differences, run: diff -bBEu config.h config.h.dist"
 	@false
 
 doc: Doxyfile *.c *.h