diff --git a/mozilla/htmlparser/src/nsExpatDriver.cpp b/mozilla/htmlparser/src/nsExpatDriver.cpp
index 7d69de1ae03..114d600a0e7 100644
--- a/mozilla/htmlparser/src/nsExpatDriver.cpp
+++ b/mozilla/htmlparser/src/nsExpatDriver.cpp
@@ -253,6 +253,10 @@ nsExpatDriver::nsExpatDriver()
 nsExpatDriver::~nsExpatDriver() 
 {
   NS_IF_RELEASE(mSink);
+  if (mExpatParser) {
+    XML_ParserFree(mExpatParser);
+    mExpatParser = nsnull;
+  }
 }
 
 nsresult 
diff --git a/mozilla/parser/htmlparser/src/nsExpatDriver.cpp b/mozilla/parser/htmlparser/src/nsExpatDriver.cpp
index 7d69de1ae03..114d600a0e7 100644
--- a/mozilla/parser/htmlparser/src/nsExpatDriver.cpp
+++ b/mozilla/parser/htmlparser/src/nsExpatDriver.cpp
@@ -253,6 +253,10 @@ nsExpatDriver::nsExpatDriver()
 nsExpatDriver::~nsExpatDriver() 
 {
   NS_IF_RELEASE(mSink);
+  if (mExpatParser) {
+    XML_ParserFree(mExpatParser);
+    mExpatParser = nsnull;
+  }
 }
 
 nsresult