diff --git a/src/autofit/afgsub.c b/src/autofit/afgsub.c
index a9e3996a7..2adf809dd 100644
--- a/src/autofit/afgsub.c
+++ b/src/autofit/afgsub.c
@@ -370,6 +370,7 @@
     return;
 
   Fail:
+    globals->gsub_lookup_count = 0;
     FT_FREE( gsub );
     FT_FREE( gsub_lookups_single_alternate );
   }