diff --git a/plug-ins/file-tiff/file-tiff-export.c b/plug-ins/file-tiff/file-tiff-export.c
index 6d65a470c3..3f6531ff4d 100644
--- a/plug-ins/file-tiff/file-tiff-export.c
+++ b/plug-ins/file-tiff/file-tiff-export.c
@@ -148,7 +148,7 @@ save_paths (TIFF      *tif,
 
       if (tmpname && err == NULL)
         {
-          g_string_append_c (data, MIN (len, 255));
+          g_string_append_c (data, (gchar) MIN (len, 255));
           g_string_append_len (data, tmpname, MIN (len, 255));
           g_free (tmpname);
         }