diff --git a/DNS-API-Dev-Guide.md b/DNS-API-Dev-Guide.md
index 0cec7b9..0a47d5a 100644
--- a/DNS-API-Dev-Guide.md
+++ b/DNS-API-Dev-Guide.md
@@ -257,6 +257,6 @@ To avoid the most common travis failures:
 
 * Use indentation with 2 spaces 
 * remove trailing spaces 
-* Doublequote variables  (use echo  _debug "txtvalue=$txtvalue" instead of  _debug txtvalue=$txtvalue)
+* Doublequote variables  (use _debug txtvalue "$txtvalue" instead of  _debug txtvalue=$txtvalue)
 * Always check the travis results after a commit 
 * Consider using shellcheck (https://www.shellcheck.net/) before commiting 
\ No newline at end of file