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-rw-r--r--ext/tk/tkutil/tkutil.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/tk/tkutil/tkutil.c b/ext/tk/tkutil/tkutil.c
index fc9ed2d5e3..147dfa23d1 100644
--- a/ext/tk/tkutil/tkutil.c
+++ b/ext/tk/tkutil/tkutil.c
@@ -804,6 +804,7 @@ tk_hash_kv(argc, argv, self)
switch(argc) {
case 3:
ary = argv[2];
+ Check_Type(ary, T_ARRAY);
case 2:
enc_flag = argv[1];
case 1: