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-rw-r--r--ext/zlib/zlib.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index fee74bf..4086496 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -3369,7 +3369,7 @@ rb_gzwriter_write(VALUE obj, VALUE str)
{
struct gzfile *gz = get_gzfile(obj);
- if (TYPE(str) != T_STRING)
+ if (!RB_TYPE_P(str, T_STRING))
str = rb_obj_as_string(str);
if (gz->enc2 && gz->enc2 != rb_ascii8bit_encoding()) {
str = rb_str_conv_enc(str, rb_enc_get(str), gz->enc2);