diff --git a/Delete-flags.c b/Delete-flags.c
index d164d46..0867628 100644
--- a/Delete-flags.c
+++ b/Delete-flags.c
@@ -89,7 +89,7 @@ int FlagsParse(int argc, char **argv)
         break;
 
       default:
-        fprintf(stderr, "### Delete - \"-%c\" is not an option.", c);
+        fprintf(stderr, "### Delete - \"-%c\" is not an option.\n", c);
         exit(1); 
       }
             
diff --git a/flags.rb b/flags.rb
index 1f27f05..eecdb58 100644
--- a/flags.rb
+++ b/flags.rb
@@ -333,7 +333,7 @@ int FlagsParse(int argc, char **argv)
 % end # options.each
 
       default:
-        fprintf(stderr, "### <%= name %> - \"-%c\" is not an option.", c);
+        fprintf(stderr, "### <%= name %> - \"-%c\" is not an option.\n", c);
         exit(1); 
       }