1 files changed, 4 insertions, 3 deletions

diff --git a/src/firejail/macros.c b/src/firejail/macros.c
index ef64178b5..17ccbdff2 100644
--- a/src/firejail/macros.c
+++ b/src/firejail/macros.c
@@ -300,13 +300,14 @@ void invalid_filename(const char *fname, int globbing) {
         size_t i = 0;
         while (ptr[i] != '\0') {
                 if (iscntrl((unsigned char) ptr[i])) {
-                        fprintf(stderr, "Error: \"%s\" is an invalid filename: no control characters allowed\n",
-                                fix_control_chars(fname));
+                        char *msg = fix_control_chars(fname);
+                        fprintf(stderr, "Error: \"%s\" is an invalid filename: no control characters allowed\n", msg);
+                        free(msg);
                         exit(1);
                 }
                 i++;
         }
-        
+
         char *reject;
         if (globbing)
                 reject = "\\&!\"'<>%^{};,"; // file globbing ('*?[]') is allowed