diff --git a/dom/plugins/base/nsNPAPIPlugin.cpp b/dom/plugins/base/nsNPAPIPlugin.cpp
index 5358d2ee60a0..48c621a63887 100644
--- a/dom/plugins/base/nsNPAPIPlugin.cpp
+++ b/dom/plugins/base/nsNPAPIPlugin.cpp
@@ -113,8 +113,8 @@ static NPNetscapeFuncs sBrowserFuncs = {
   _memfree,
   _memflush,
   _reloadplugins,
-  nullptr, // _getJavaEnv, unimplemented
-  nullptr, // _getJavaPeer, unimplemented
+  _getJavaEnv,
+  _getJavaPeer,
   _geturlnotify,
   _posturlnotify,
   _getvalue,
@@ -1703,6 +1703,14 @@ _requestread(NPStream *pstream, NPByteRange *rangeList)
   return NPERR_STREAM_NOT_SEEKABLE;
 }
 
+// Deprecated, only stubbed out
+void* /* OJI type: JRIEnv* */
+_getJavaEnv()
+{
+  NPN_PLUGIN_LOG(PLUGIN_LOG_NORMAL, ("NPN_GetJavaEnv\n"));
+  return nullptr;
+}
+
 const char *
 _useragent(NPP npp)
 {
@@ -1736,6 +1744,14 @@ _memalloc (uint32_t size)
   return moz_xmalloc(size);
 }
 
+// Deprecated, only stubbed out
+void* /* OJI type: jref */
+_getJavaPeer(NPP npp)
+{
+  NPN_PLUGIN_LOG(PLUGIN_LOG_NORMAL, ("NPN_GetJavaPeer: npp=%p\n", (void*)npp));
+  return nullptr;
+}
+
 void
 _pushpopupsenabledstate(NPP npp, NPBool enabled)
 {
diff --git a/dom/plugins/base/nsNPAPIPlugin.h b/dom/plugins/base/nsNPAPIPlugin.h
index e8c51741fdad..5d012714dde0 100644
--- a/dom/plugins/base/nsNPAPIPlugin.h
+++ b/dom/plugins/base/nsNPAPIPlugin.h
@@ -279,6 +279,13 @@ _useragent(NPP npp);
 void*
 _memalloc (uint32_t size);
 
+// Deprecated entry points for the old Java plugin.
+void* /* OJI type: JRIEnv* */
+_getJavaEnv();
+
+void* /* OJI type: jref */
+_getJavaPeer(NPP npp);
+
 void
 _urlredirectresponse(NPP instance, void* notifyData, NPBool allow);
 
diff --git a/dom/plugins/ipc/PluginModuleChild.cpp b/dom/plugins/ipc/PluginModuleChild.cpp
index 68c6a956be13..55d18fcb27a1 100644
--- a/dom/plugins/ipc/PluginModuleChild.cpp
+++ b/dom/plugins/ipc/PluginModuleChild.cpp
@@ -875,6 +875,14 @@ _useragent(NPP aNPP);
 static void*
 _memalloc (uint32_t size);
 
+// Deprecated entry points for the old Java plugin.
+static void* /* OJI type: JRIEnv* */
+_getjavaenv(void);
+
+// Deprecated entry points for the old Java plugin.
+static void* /* OJI type: jref */
+_getjavapeer(NPP aNPP);
+
 static bool
 _invoke(NPP aNPP, NPObject* npobj, NPIdentifier method, const NPVariant *args,
         uint32_t argCount, NPVariant *result);
@@ -979,8 +987,8 @@ const NPNetscapeFuncs PluginModuleChild::sBrowserFuncs = {
     mozilla::plugins::child::_memfree,
     mozilla::plugins::child::_memflush,
     mozilla::plugins::child::_reloadplugins,
-    nullptr, // _getjavaenv, unimplemented
-    nullptr, // _getjavapeer, unimplemented
+    mozilla::plugins::child::_getjavaenv,
+    mozilla::plugins::child::_getjavapeer,
     mozilla::plugins::child::_geturlnotify,
     mozilla::plugins::child::_posturlnotify,
     mozilla::plugins::child::_getvalue,
@@ -1296,6 +1304,21 @@ _memalloc(uint32_t aSize)
     return moz_xmalloc(aSize);
 }
 
+// Deprecated entry points for the old Java plugin.
+void* /* OJI type: JRIEnv* */
+_getjavaenv(void)
+{
+    PLUGIN_LOG_DEBUG_FUNCTION;
+    return 0;
+}
+
+void* /* OJI type: jref */
+_getjavapeer(NPP aNPP)
+{
+    PLUGIN_LOG_DEBUG_FUNCTION;
+    return 0;
+}
+
 bool
 _invoke(NPP aNPP,
         NPObject* aNPObj,