diff --git a/src/shk.c b/src/shk.c
index 2828d2c40..813dd2e91 100644
--- a/src/shk.c
+++ b/src/shk.c
@@ -2503,7 +2503,7 @@ add_to_billobjs(struct obj* obj)
     obj->where = OBJ_ONBILL;
 
     /* if hero drinks a shop-owned potion, it will have been flagged
-       in_use by dodrink/dopotion but isn't being be used up yet because
+       in_use by dodrink/dopotion but isn't being used up yet because
        it stays on the bill; only object sanity checking actually cares */
     obj->in_use = 0;
     /* ... same for bypass by destroy_item */