diff --git a/WebCore/platform/text/TextCodecICU.cpp b/WebCore/platform/text/TextCodecICU.cpp
index 7ebce2c..548e9c1 100644
--- a/WebCore/platform/text/TextCodecICU.cpp
+++ b/WebCore/platform/text/TextCodecICU.cpp
@@ -371,7 +371,7 @@ static void urlEscapedEntityCallback(const void* context, UConverterFromUnicodeA
 }
 
 // Substitutes special GBK characters, escaping all other unassigned entities.
-static void gbkCallbackEscape(const void* context, UConverterFromUnicodeArgs* fromUArgs, const UChar* codeUnits, int32_t length,
+extern "C" static void gbkCallbackEscape(const void* context, UConverterFromUnicodeArgs* fromUArgs, const UChar* codeUnits, int32_t length,
                               UChar32 codePoint, UConverterCallbackReason reason, UErrorCode* err) 
 {
     UChar outChar;
@@ -401,7 +401,7 @@ static void gbkUrlEscapedEntityCallack(const void* context, UConverterFromUnicod
     UCNV_FROM_U_CALLBACK_ESCAPE(context, fromUArgs, codeUnits, length, codePoint, reason, err);
 }
 
-static void gbkCallbackSubstitute(const void* context, UConverterFromUnicodeArgs* fromUArgs, const UChar* codeUnits, int32_t length,
+extern "C" static void gbkCallbackSubstitute(const void* context, UConverterFromUnicodeArgs* fromUArgs, const UChar* codeUnits, int32_t length,
                                   UChar32 codePoint, UConverterCallbackReason reason, UErrorCode* err) 
 {
     UChar outChar;
diff --git a/WebCore/plugins/npapi.cpp b/WebCore/plugins/npapi.cpp
index 4135b64..457db0e 100644
--- a/WebCore/plugins/npapi.cpp
+++ b/WebCore/plugins/npapi.cpp
@@ -171,7 +171,9 @@ void NPN_PopPopupsEnabledState(NPP instance)
     pluginViewForInstance(instance)->popPopupsEnabledState();
 }
 
+U_CDECL_BEGIN
 void NPN_PluginThreadAsyncCall(NPP instance, void (*func) (void *), void *userData)
 {
     PluginMainThreadScheduler::scheduler().scheduleCall(instance, func, userData);
 }
+U_CDECL_END