diff --git a/src/library.c b/src/library.c
index ca5b9b83..f04fa0d9 100644
--- a/src/library.c
+++ b/src/library.c
@@ -747,7 +747,16 @@ library_init(void)
   for (i = 0; sources[i]; i++)
     {
       if (!sources[i]->init)
-	continue;
+        {
+          DPRINTF(E_LOG, L_LIB, "BUG: library source '%s' has no init()\n", sources[i]->name);
+          return -1;
+        }
+
+      if (!sources[i]->metarescan)
+        {
+          DPRINTF(E_LOG, L_LIB, "BUG: library source '%s' has no metarescan()\n", sources[i]->name);
+          return -1;
+        }
 
       ret = sources[i]->init();
       if (ret < 0)
diff --git a/src/spotify_webapi.c b/src/spotify_webapi.c
index 82d68315..07160b70 100644
--- a/src/spotify_webapi.c
+++ b/src/spotify_webapi.c
@@ -1965,6 +1965,7 @@ struct library_source spotifyscanner =
   .init = spotifywebapi_init,
   .deinit = spotifywebapi_deinit,
   .rescan = rescan,
+  .metarescan = rescan,
   .initscan = initscan,
   .fullrescan = fullrescan,
   .queue_add = queue_add,