Index: ext/openssl/ossl_asn1.c
===================================================================
--- ext/openssl/ossl_asn1.c	(revision 42123)
+++ ext/openssl/ossl_asn1.c	(working copy)
@@ -33,15 +33,22 @@ asn1time_to_time(ASN1_TIME *time)
 {
     struct tm tm;
     VALUE argv[6];
+    int count;
 
     if (!time || !time->data) return Qnil;
     memset(&tm, 0, sizeof(struct tm));
 
     switch (time->type) {
     case V_ASN1_UTCTIME:
-	if (sscanf((const char *)time->data, "%2d%2d%2d%2d%2d%2dZ", &tm.tm_year, &tm.tm_mon,
-    		&tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
-	    ossl_raise(rb_eTypeError, "bad UTCTIME format");
+	count = sscanf((const char *)time->data, "%2d%2d%2d%2d%2d%2dZ",
+		&tm.tm_year, &tm.tm_mon, &tm.tm_mday, &tm.tm_hour, &tm.tm_min,
+		&tm.tm_sec);
+
+	if (count == 5) {
+	    tm.tm_sec = 0;
+	} else if (count != 6) {
+	    ossl_raise(rb_eTypeError, "bad UTCTIME format: \"%s\"",
+		    time->data);
 	}
 	if (tm.tm_year < 69) {
 	    tm.tm_year += 2000;
Index: test/openssl/test_asn1.rb
===================================================================
--- test/openssl/test_asn1.rb	(revision 42123)
+++ test/openssl/test_asn1.rb	(working copy)
@@ -263,6 +263,14 @@ rEzBQ0F9dUyqQ9gyRg8KHhDfv9HzT1d/rnUZMkoo
     end
   end
 
+  def test_decode_utctime
+    expected = Time.at 1374535380
+    assert_equal expected, OpenSSL::ASN1.decode("\x17\v1307222323Z").value
+
+    expected += 17
+    assert_equal expected, OpenSSL::ASN1.decode("\x17\r130722232317Z").value
+  end
+
   def test_create_inf_length_primitive
     expected = %w{ 24 80 04 01 61 00 00 }
     raw = [expected.join('')].pack('H*')