diff --git a/thumbs.c b/thumbs.c
index bd1e314..c7b9dc6 100644
--- a/thumbs.c
+++ b/thumbs.c
@@ -198,6 +198,8 @@ CLEANUP void tns_free(tns_t *tns)
 
 	free(cache_dir);
 	cache_dir = NULL;
+	free(cache_tmpfile);
+	cache_tmpfile = cache_tmpfile_base = NULL;
 }
 
 static Imlib_Image tns_scale_down(Imlib_Image im, int dim)