1 files changed, 1 insertions, 0 deletions
diff --git a/compile.c b/compile.c
index 55f500b489..d30966db35 100644
--- a/compile.c
+++ b/compile.c
@@ -2479,6 +2479,7 @@ compile_array_(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE* node_root,
 			    if (i > 0 || !first) ADD_INSN(ret, line, swap);
 			    COMPILE(ret, "keyword splat", kw);
 			    ADD_SEND(ret, line, ID2SYM(id_core_hash_merge_kwd), nhash);
+			    if (nhash == INT2FIX(1)) ADD_SEND(ret, line, ID2SYM(rb_intern("dup")), INT2FIX(0));
 			}
 			first = 0;
 			break;