diff --git a/rtenets b/rtenets
index d1df445..41c48bf 100755
--- a/rtenets
+++ b/rtenets
@@ -48,13 +48,13 @@ readonly MANDATORY_FILES=("README.md"
 
 # Print error and exit
 error() {
-    printf "${RED}error${NC}: %s\\n" "$@" 1>&2
+    printf "${RED}error${NC}: %b\\n" "$@" 1>&2
     exit 1
 }
 
 # Print warning
 warning() {
-    printf "${ORANGE}warning${NC}: %s\\n" "$@" 1>&2
+    printf "${ORANGE}warning${NC}: %b\\n" "$@" 1>&2
 }
 
 # Print info