diff --git a/rechnung.sh b/rechnung.sh
index a6813f5..0e8418e 100755
--- a/rechnung.sh
+++ b/rechnung.sh
@@ -134,7 +134,7 @@ print_warn() {
     msg=$*
 
     if [ "$COLORED_OUTPUT" -eq 1 ]; then
-        echo "$YELLOW[-]$NORMAL $msg"
+        echo "${YELLOW}[-]$NORMAL $msg"
     else
         echo "[-] $msg"
     fi