diff --git a/mozilla/extensions/java/xpcom/src/nsJavaWrapper.cpp b/mozilla/extensions/java/xpcom/src/nsJavaWrapper.cpp
index f2b779447c3..bff0ad77ab9 100644
--- a/mozilla/extensions/java/xpcom/src/nsJavaWrapper.cpp
+++ b/mozilla/extensions/java/xpcom/src/nsJavaWrapper.cpp
@@ -1360,7 +1360,7 @@ QueryMethodInfo(nsIInterfaceInfo* aIInfo, const char* aMethodName,
 /**
  *  org.mozilla.xpcom.XPCOMJavaProxy.internal.callXPCOMMethod
  */
-extern "C" NS_EXPORT jobject
+extern "C" NS_EXPORT jobject JNICALL
 JAVAPROXY_NATIVE(callXPCOMMethod) (JNIEnv *env, jclass that, jobject aJavaProxy,
                                    jstring aMethodName, jobjectArray aParams)
 {
@@ -1671,7 +1671,7 @@ GetXPCOMInstFromProxy(JNIEnv* env, jobject aJavaObject, void** aResult)
 /**
  *  org.mozilla.xpcom.internal.XPCOMJavaProxy.finalizeProxy
  */
-extern "C" NS_EXPORT void
+extern "C" NS_EXPORT void JNICALL
 JAVAPROXY_NATIVE(finalizeProxy) (JNIEnv *env, jclass that, jobject aJavaProxy)
 {
 #ifdef DEBUG_JAVAXPCOM
@@ -1723,7 +1723,7 @@ JAVAPROXY_NATIVE(finalizeProxy) (JNIEnv *env, jclass that, jobject aJavaProxy)
 /**
  *  org.mozilla.xpcom.XPCOMJavaProxy.isSameXPCOMObject
  */
-extern "C" NS_EXPORT jboolean
+extern "C" NS_EXPORT jboolean JNICALL
 JAVAPROXY_NATIVE(isSameXPCOMObject) (JNIEnv *env, jclass that,
                                      jobject aProxy1, jobject aProxy2)
 {
@@ -1746,7 +1746,7 @@ JAVAPROXY_NATIVE(isSameXPCOMObject) (JNIEnv *env, jclass that,
 /**
  *  org.mozilla.xpcom.ProfileLock.release
  */
-extern "C" NS_EXPORT void
+extern "C" NS_EXPORT void JNICALL
 LOCKPROXY_NATIVE(release) (JNIEnv *env, jclass that, jlong aLockObject)
 {
   // Need to release object on the main thread.