diff --git a/intl/uconv/src/nsUConvModule.cpp b/intl/uconv/src/nsUConvModule.cpp
index 21bfa61652ef..93daeccc7e5f 100644
--- a/intl/uconv/src/nsUConvModule.cpp
+++ b/intl/uconv/src/nsUConvModule.cpp
@@ -355,9 +355,7 @@ NS_GENERIC_FACTORY_CONSTRUCTOR(nsUnicodeToISO2022JP)
NS_GENERIC_FACTORY_CONSTRUCTOR(nsISO2022KRToUnicode)
// ucvcn
-NS_GENERIC_FACTORY_CONSTRUCTOR(nsGB2312ToUnicodeV2)
NS_GENERIC_FACTORY_CONSTRUCTOR(nsUnicodeToGB2312V2)
-NS_GENERIC_FACTORY_CONSTRUCTOR(nsGBKToUnicode)
NS_GENERIC_FACTORY_CONSTRUCTOR(nsUnicodeToGBK)
NS_GENERIC_FACTORY_CONSTRUCTOR(nsHZToUnicode)
NS_GENERIC_FACTORY_CONSTRUCTOR(nsUnicodeToHZ)
@@ -839,9 +837,9 @@ static const mozilla::Module::CIDEntry kUConvCIDs[] = {
{ &kNS_JOHABTOUNICODE_CID, false, nullptr, nsJohabToUnicodeConstructor },
{ &kNS_UNICODETOJOHAB_CID, false, nullptr, nsUnicodeToJohabConstructor },
{ &kNS_ISO2022KRTOUNICODE_CID, false, nullptr, nsISO2022KRToUnicodeConstructor },
- { &kNS_GB2312TOUNICODE_CID, false, nullptr, nsGB2312ToUnicodeV2Constructor },
+ { &kNS_GB2312TOUNICODE_CID, false, nullptr, nsGB18030ToUnicodeConstructor },
{ &kNS_UNICODETOGB2312_CID, false, nullptr, nsUnicodeToGB2312V2Constructor },
- { &kNS_GBKTOUNICODE_CID, false, nullptr, nsGBKToUnicodeConstructor },
+ { &kNS_GBKTOUNICODE_CID, false, nullptr, nsGB18030ToUnicodeConstructor },
{ &kNS_UNICODETOGBK_CID, false, nullptr, nsUnicodeToGBKConstructor },
{ &kNS_HZTOUNICODE_CID, false, nullptr, nsHZToUnicodeConstructor },
{ &kNS_UNICODETOHZ_CID, false, nullptr, nsUnicodeToHZConstructor },
diff --git a/intl/uconv/tests/mochitest.ini b/intl/uconv/tests/mochitest.ini
index a9ce7ac33615..957e5341bda8 100644
--- a/intl/uconv/tests/mochitest.ini
+++ b/intl/uconv/tests/mochitest.ini
@@ -2,6 +2,7 @@
[test_bug335816.html]
[test_bug843434.html]
+[test_bug959058.html]
[test_long_doc.html]
[test_singlebyte_overconsumption.html]
[test_unicode_noncharacterescapes.html]
diff --git a/intl/uconv/tests/test_bug959058.html b/intl/uconv/tests/test_bug959058.html
new file mode 100644
index 000000000000..109409397510
--- /dev/null
+++ b/intl/uconv/tests/test_bug959058.html
@@ -0,0 +1,28 @@
+
+
+
+
+
+ Test for Bug 959058
+
+
+
+
+
+Mozilla Bug 959058
+
+
+
+
+
+
+
+