diff --git a/modules/libreg/include/NSReg.h b/modules/libreg/include/NSReg.h
index f26a917eae8f..1125ea278445 100644
--- a/modules/libreg/include/NSReg.h
+++ b/modules/libreg/include/NSReg.h
@@ -115,27 +115,8 @@ typedef struct _reginfo
 
 #define UNIX_GLOBAL_FLAG     "MOZILLA_SHARED_REGISTRY"
 
-/* Platform-dependent declspec for library interface */
-#if defined(XP_WIN)
-  #if defined(WIN32)
-    #if defined (STANDALONE_REGISTRY)
-       #define VR_INTERFACE(type)     __declspec(dllexport) type __cdecl
-    #else
-       #define VR_INTERFACE(type)     __declspec(dllexport) type __stdcall
-    #endif
-
-  #else
-  #define VR_INTERFACE(type)     type _far _pascal _export
-  #endif
-#elif defined(XP_OS2) && defined(__declspec)
-  #define VR_INTERFACE(type)     __declspec(dllexport) type
-#elif defined XP_MAC
-  #define VR_INTERFACE(__x)  __declspec(export) __x
-#elif defined (HAVE_VISIBILITY_ATTRIBUTE)
-  #define VR_INTERFACE(type)     __attribute__ ((visibility ("default"))) type
-#else
-  #define VR_INTERFACE(type)     type
-#endif
+/* libreg functions are not DLLexported and may have hidden visibility */
+#define VR_INTERFACE(type)     type
 
 PR_BEGIN_EXTERN_C
 
diff --git a/modules/oji/src/nsJVMManager.cpp b/modules/oji/src/nsJVMManager.cpp
index 4eabb4706e05..61208d9bd819 100644
--- a/modules/oji/src/nsJVMManager.cpp
+++ b/modules/oji/src/nsJVMManager.cpp
@@ -790,7 +790,7 @@ nsJVMManager::GetJVMStatus(void)
     return fStatus;
 }
 
-extern "C" nsresult JSJ_RegisterLiveConnectFactory(void);
+extern "C" NS_VISIBILITY_DEFAULT nsresult JSJ_RegisterLiveConnectFactory(void);
 
 PRBool
 nsJVMManager::MaybeStartupLiveConnect(void)
diff --git a/widget/src/xpwidgets/nsPrintOptionsImpl.h b/widget/src/xpwidgets/nsPrintOptionsImpl.h
index 7a0727f077c8..d84b34aed7a3 100644
--- a/widget/src/xpwidgets/nsPrintOptionsImpl.h
+++ b/widget/src/xpwidgets/nsPrintOptionsImpl.h
@@ -48,9 +48,6 @@
 #include "nsString.h"
 #include "nsFont.h"
 
-#undef  IMETHOD_VISIBILITY
-#define IMETHOD_VISIBILITY NS_VISIBILITY_DEFAULT
-
 /**
  *   Class nsPrintOptions
  */
@@ -134,7 +131,4 @@ private:
   nsPrintOptions& operator=(const nsPrintOptions& x);
 };
 
-#undef  IMETHOD_VISIBILITY
-#define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN
-
 #endif /* nsPrintOptionsImpl_h__ */
diff --git a/widget/src/xpwidgets/nsPrintSettingsImpl.h b/widget/src/xpwidgets/nsPrintSettingsImpl.h
index cb95f06183cc..f2efaee72a30 100644
--- a/widget/src/xpwidgets/nsPrintSettingsImpl.h
+++ b/widget/src/xpwidgets/nsPrintSettingsImpl.h
@@ -52,9 +52,6 @@
 //***    nsPrintSettings
 //*****************************************************************************
 
-#undef  IMETHOD_VISIBILITY
-#define IMETHOD_VISIBILITY NS_VISIBILITY_DEFAULT
-
 class nsPrintSettings : public nsIPrintSettings
 {
 public:
@@ -136,7 +133,4 @@ protected:
 
 };
 
-#undef  IMETHOD_VISIBILITY
-#define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN
-
 #endif /* nsPrintSettings_h__ */