diff --git a/lib/sl/lex.l b/lib/sl/lex.l
index 4a3896f0a..1092d5d1f 100644
--- a/lib/sl/lex.l
+++ b/lib/sl/lex.l
@@ -32,6 +32,8 @@
  * SUCH DAMAGE. 
  */
 
+#undef ECHO
+
 #include "make_cmds.h"
 #include "parse.h"
 
@@ -42,8 +44,6 @@ static int getstring(void);
 
 #define YY_NO_UNPUT
 
-#undef ECHO
-
 %}