diff --git a/libisofs/fs_image.c b/libisofs/fs_image.c
index 9ad2470..b2eeb77 100644
--- a/libisofs/fs_image.c
+++ b/libisofs/fs_image.c
@@ -1601,6 +1601,7 @@ int iso_file_source_new_ifs(IsoImageFilesystem *fs, IsoFileSource *parent,
                            cs_value);
                 }
                 iso_msgs_submit(0, msg, 0, "NOTE", 0);
+                free(cs_value);
                 cs_value = NULL;
             }
         }