diff --git a/bin/compile b/bin/compile
index 736d1a2..6c10366 100755
--- a/bin/compile
+++ b/bin/compile
@@ -94,10 +94,9 @@ function set-env (){
 
 # Usage: $ set-default-env key value
 function set-default-env (){
-  echo "export $1=${$1:$2}" >> $PROFILE_PATH
+  echo "export $1=\${\$$1:-$2}" >> $PROFILE_PATH
 }
 
-
 # ## Build Time
 #