diff --git a/gtk.c b/gtk.c
index 1af877c..e6a0366 100644
--- a/gtk.c
+++ b/gtk.c
@@ -2705,6 +2705,7 @@ int main(int argc, char **argv)
 		    return 1;
 		}
 		sfree(realname);
+                ctx.error = 0;
 		midend_serialise(me, savefile_write, &ctx);
 		if (ctx.error) {
 		    fprintf(stderr, "%s: write: %s\n", realname,