diff --git a/base/src/nsVariant.cpp b/base/src/nsVariant.cpp
index 5378272a15f..5992d9af897 100644
--- a/base/src/nsVariant.cpp
+++ b/base/src/nsVariant.cpp
@@ -56,7 +56,7 @@ nsVariant::~nsVariant()
 {
     switch (mType) {
       case nsVariantType_voidPtr:
-        delete (void*)mValue;
+        delete mValue;
         break;
       case nsVariantType_charPtr:
         nsCRT::free(mValue.mUnion._charPtr);
diff --git a/xpcom/ds/nsVariant.cpp b/xpcom/ds/nsVariant.cpp
index 5378272a15f..5992d9af897 100644
--- a/xpcom/ds/nsVariant.cpp
+++ b/xpcom/ds/nsVariant.cpp
@@ -56,7 +56,7 @@ nsVariant::~nsVariant()
 {
     switch (mType) {
       case nsVariantType_voidPtr:
-        delete (void*)mValue;
+        delete mValue;
         break;
       case nsVariantType_charPtr:
         nsCRT::free(mValue.mUnion._charPtr);