diff --git a/src/decoder/plugins/GmeDecoderPlugin.cxx b/src/decoder/plugins/GmeDecoderPlugin.cxx
index c8f7ae2d4..d623f6ad6 100644
--- a/src/decoder/plugins/GmeDecoderPlugin.cxx
+++ b/src/decoder/plugins/GmeDecoderPlugin.cxx
@@ -319,13 +319,13 @@ gme_container_scan(Path path_fs)
 	TagBuilder tag_builder;
 
 	auto tail = list.before_begin();
-	for (unsigned i = 1; i <= num_songs; ++i) {
+	for (unsigned i = 0; i < num_songs; ++i) {
 		ScanMusicEmu(emu, i,
 			     add_tag_handler, &tag_builder);
 
 		char track_name[64];
 		snprintf(track_name, sizeof(track_name),
-			 SUBTUNE_PREFIX "%03u.%s", i, subtune_suffix);
+			 SUBTUNE_PREFIX "%03u.%s", i+1, subtune_suffix);
 		tail = list.emplace_after(tail, track_name,
 					  tag_builder.Commit());
 	}