diff --git a/Source/CPack/cmCPackLog.cxx b/Source/CPack/cmCPackLog.cxx
index 85861c705..d643589a6 100644
--- a/Source/CPack/cmCPackLog.cxx
+++ b/Source/CPack/cmCPackLog.cxx
@@ -44,7 +44,7 @@ cmCPackLog::~cmCPackLog()
 }
 
 //----------------------------------------------------------------------
-void cmCPackLog::SetLogOutputStream(ostream* os)
+void cmCPackLog::SetLogOutputStream(std::ostream* os)
 {
   if ( m_LogOutputCleanup && m_LogOutput )
     {
diff --git a/Source/CPack/cmCPackLog.h b/Source/CPack/cmCPackLog.h
index 526f0ae57..f43f51313 100644
--- a/Source/CPack/cmCPackLog.h
+++ b/Source/CPack/cmCPackLog.h
@@ -84,13 +84,13 @@ public:
   bool GetQuiet() { return m_Quiet; }
 
   //! Set the output stream
-  void SetOutputStream(ostream* os) { m_DefaultOutput = os; }
+  void SetOutputStream(std::ostream* os) { m_DefaultOutput = os; }
 
   //! Set the error stream
-  void SetErrorStream(ostream* os) { m_DefaultError = os; }
+  void SetErrorStream(std::ostream* os) { m_DefaultError = os; }
 
   //! Set the log output stream
-  void SetLogOutputStream(ostream* os);
+  void SetLogOutputStream(std::ostream* os);
 
   //! Set the log output file. The cmCPackLog will try to create file. If it
   // cannot, it will report an error.