diff --git a/dom/ipc/PBrowser.ipdl b/dom/ipc/PBrowser.ipdl
index 74c9e4ca6bd..67b1a685434 100644
--- a/dom/ipc/PBrowser.ipdl
+++ b/dom/ipc/PBrowser.ipdl
@@ -157,7 +157,7 @@ parent:
     sync EndIMEComposition(bool cancel) returns (nsString composition);
 
     sync GetInputContext() returns (int32_t IMEEnabled, int32_t IMEOpen,
-                                    int64_t NativeIMEContext);
+                                    intptr_t NativeIMEContext);
 
     SetInputContext(int32_t IMEEnabled,
                     int32_t IMEOpen,
diff --git a/dom/ipc/TabParent.cpp b/dom/ipc/TabParent.cpp
index a3d9686d94f..f291e56a54f 100644
--- a/dom/ipc/TabParent.cpp
+++ b/dom/ipc/TabParent.cpp
@@ -744,7 +744,7 @@ TabParent::RecvEndIMEComposition(const bool& aCancel,
 bool
 TabParent::RecvGetInputContext(int32_t* aIMEEnabled,
                                int32_t* aIMEOpen,
-                               int64_t* aNativeIMEContext)
+                               intptr_t* aNativeIMEContext)
 {
   nsCOMPtr<nsIWidget> widget = GetWidget();
   if (!widget) {
@@ -757,7 +757,7 @@ TabParent::RecvGetInputContext(int32_t* aIMEEnabled,
   InputContext context = widget->GetInputContext();
   *aIMEEnabled = static_cast<int32_t>(context.mIMEState.mEnabled);
   *aIMEOpen = static_cast<int32_t>(context.mIMEState.mOpen);
-  *aNativeIMEContext = reinterpret_cast<int64_t>(context.mNativeIMEContext);
+  *aNativeIMEContext = reinterpret_cast<intptr_t>(context.mNativeIMEContext);
   return true;
 }
 
diff --git a/dom/ipc/TabParent.h b/dom/ipc/TabParent.h
index 2810c2eef26..e6c265d1108 100644
--- a/dom/ipc/TabParent.h
+++ b/dom/ipc/TabParent.h
@@ -124,7 +124,7 @@ public:
                                        nsString* aComposition);
     virtual bool RecvGetInputContext(int32_t* aIMEEnabled,
                                      int32_t* aIMEOpen,
-                                     int64_t* aNativeIMEContext);
+                                     intptr_t* aNativeIMEContext);
     virtual bool RecvSetInputContext(const int32_t& aIMEEnabled,
                                      const int32_t& aIMEOpen,
                                      const nsString& aType,
diff --git a/widget/xpwidgets/PuppetWidget.cpp b/widget/xpwidgets/PuppetWidget.cpp
index 78c52986ee6..6f63acbeb12 100644
--- a/widget/xpwidgets/PuppetWidget.cpp
+++ b/widget/xpwidgets/PuppetWidget.cpp
@@ -382,7 +382,7 @@ PuppetWidget::GetInputContext()
   InputContext context;
   if (mTabChild) {
     int32_t enabled, open;
-    int64_t nativeIMEContext;
+    intptr_t nativeIMEContext;
     mTabChild->SendGetInputContext(&enabled, &open, &nativeIMEContext);
     context.mIMEState.mEnabled = static_cast<IMEState::Enabled>(enabled);
     context.mIMEState.mOpen = static_cast<IMEState::Open>(open);