diff --git a/pages/common/lex.md b/pages/common/lex.md
index 1972f72159..1f60a59355 100644
--- a/pages/common/lex.md
+++ b/pages/common/lex.md
@@ -9,7 +9,7 @@
 
 - Specify the output file:
 
-`lex {{analyser.l}} --outfile {{analyser.c}}
+`lex {{analyser.l}} --outfile {{analyser.c}}`
 
 - Compile a C file generated by lex: