diff --git a/mozilla/htmlparser/src/nsParser.cpp b/mozilla/htmlparser/src/nsParser.cpp
index 3d5061e03fb..80c1e16e491 100644
--- a/mozilla/htmlparser/src/nsParser.cpp
+++ b/mozilla/htmlparser/src/nsParser.cpp
@@ -352,7 +352,7 @@ PRInt32 nsParser::WillBuildModel(const char* aFilename, const char* aContentType
   }
 
 #ifdef DEBUG_SAVE_SOURCE_DOC
-#if defined(XP_UNIX) && defined(IRIX)
+#if defined(XP_UNIX) && (defined(IRIX) || defined(MKLINUX))
   /* XXX: IRIX does not support ios::binary */
   gTempStream =new fstream("c:/temp/out.html",ios::out);
 #else
diff --git a/mozilla/htmlparser/src/nsScanner.cpp b/mozilla/htmlparser/src/nsScanner.cpp
index 72337972685..499577577cf 100644
--- a/mozilla/htmlparser/src/nsScanner.cpp
+++ b/mozilla/htmlparser/src/nsScanner.cpp
@@ -64,7 +64,7 @@ CScanner::CScanner(const char* aFilename,eParseMode aMode) : mBuffer("") {
   mParseMode=aMode;
   mNetStream=0;
   mIncremental=PR_FALSE;
-#if defined(XP_UNIX) && defined(IRIX)
+#if defined(XP_UNIX) && (defined(IRIX) || defined(MKLINUX))
   /* XXX: IRIX does not support ios::binary */
   mFileStream=new fstream(aFilename,ios::in);
 #else
diff --git a/mozilla/parser/htmlparser/src/nsParser.cpp b/mozilla/parser/htmlparser/src/nsParser.cpp
index 3d5061e03fb..80c1e16e491 100644
--- a/mozilla/parser/htmlparser/src/nsParser.cpp
+++ b/mozilla/parser/htmlparser/src/nsParser.cpp
@@ -352,7 +352,7 @@ PRInt32 nsParser::WillBuildModel(const char* aFilename, const char* aContentType
   }
 
 #ifdef DEBUG_SAVE_SOURCE_DOC
-#if defined(XP_UNIX) && defined(IRIX)
+#if defined(XP_UNIX) && (defined(IRIX) || defined(MKLINUX))
   /* XXX: IRIX does not support ios::binary */
   gTempStream =new fstream("c:/temp/out.html",ios::out);
 #else
diff --git a/mozilla/parser/htmlparser/src/nsScanner.cpp b/mozilla/parser/htmlparser/src/nsScanner.cpp
index 72337972685..499577577cf 100644
--- a/mozilla/parser/htmlparser/src/nsScanner.cpp
+++ b/mozilla/parser/htmlparser/src/nsScanner.cpp
@@ -64,7 +64,7 @@ CScanner::CScanner(const char* aFilename,eParseMode aMode) : mBuffer("") {
   mParseMode=aMode;
   mNetStream=0;
   mIncremental=PR_FALSE;
-#if defined(XP_UNIX) && defined(IRIX)
+#if defined(XP_UNIX) && (defined(IRIX) || defined(MKLINUX))
   /* XXX: IRIX does not support ios::binary */
   mFileStream=new fstream(aFilename,ios::in);
 #else