diff --git a/src/hb-set-private.hh b/src/hb-set-private.hh
index d59f248ce..adfa88f18 100644
--- a/src/hb-set-private.hh
+++ b/src/hb-set-private.hh
@@ -297,7 +297,7 @@ struct hb_set_t
   {
     for (unsigned int i = 0; i < ELTS; i++)
       if (elts[i])
-	for (unsigned int j = 0; i < BITS; j++)
+	for (unsigned int j = 0; j < BITS; j++)
 	  if (elts[i] & (1 << j))
 	    return i * BITS + j;
     return SENTINEL;