diff --git a/tools/define.sh b/tools/define.sh
index d84015734f1..8b2b0e364cb 100755
--- a/tools/define.sh
+++ b/tools/define.sh
@@ -203,7 +203,7 @@ for vardef in $varlist; do
 			# Treat the first definition differently
 
 			if [ -z "$response" ]; then
-				response="-define:'"$varname=$varvalue
+				response="-define:"$varname=$varvalue
 			else
 				response=$response" -define:$varname=$varvalue"
 			fi