diff --git a/pages/common/flex.md b/pages/common/flex.md
index 36ed183dd..9d8db23ed 100644
--- a/pages/common/flex.md
+++ b/pages/common/flex.md
@@ -5,11 +5,11 @@
 
 - Generate an analyser from a flex file:
 
-`lex {{analyser.l}}`
+`flex {{analyser.l}}`
 
 - Specify the output file:
 
-`lex {{analyser.l}} --outfile {{analyser.c}}`
+`flex {{analyser.l}} --outfile {{analyser.c}}`
 
 - Compile a C file generated by flex: