diff --git a/source/ps/CStr.cpp b/source/ps/CStr.cpp
index 7c1c3ce37b..52cb9578ac 100755
--- a/source/ps/CStr.cpp
+++ b/source/ps/CStr.cpp
@@ -342,13 +342,13 @@ _bool CStr::operator>=(const CStr &Str) const
 	return (m_String >= Str.m_String);
 }
 
-CStr &CStr::operator+=(CStr &Str)
+CStr &CStr::operator+=(const CStr &Str)
 {
 	m_String += Str.m_String;
 	return *this;
 }
 
-CStr CStr::operator+(CStr &Str)
+CStr CStr::operator+(const CStr &Str)
 {
 	CStr NewStr(*this);
 	NewStr.m_String += Str.m_String;
@@ -393,4 +393,4 @@ ostream &operator<<(ostream &os, CStr &Str)
 {
 	os << (const TCHAR*)Str;
 	return os;
-}
\ No newline at end of file
+}
diff --git a/source/ps/CStr.h b/source/ps/CStr.h
index 5346c6ce31..dad64bfecf 100755
--- a/source/ps/CStr.h
+++ b/source/ps/CStr.h
@@ -38,6 +38,7 @@ More Info:
 #include <iostream>
 
 #include "posix.h"
+#include "misc.h"
 
 #include <cstdlib>
 using namespace std;
@@ -161,8 +162,8 @@ public:
 	_bool operator<=(const CStr &Str) const;
 	_bool operator>(const CStr &Str) const;
 	_bool operator>=(const CStr &Str) const;
-	CStr &operator+=(CStr &Str);
-	CStr  operator+(CStr &Str);
+	CStr &operator+=(const CStr &Str);
+	CStr  operator+(const CStr &Str);
 	operator const TCHAR*();
 	operator const TCHAR*() const; // Gee, I've added this, Maybe the one above should be removed?
 	TCHAR &operator[](_int n);
diff --git a/source/ps/LogFile.cpp b/source/ps/LogFile.cpp
index ed3df1733b..f3de796ec2 100755
--- a/source/ps/LogFile.cpp
+++ b/source/ps/LogFile.cpp
@@ -1,6 +1,7 @@
 // last modified Thursday, May 08, 2003
 
 #include "LogFile.h"
+#include "misc.h"
 
 //-------------------------------------------------
 //Add a hyperlink to Link.
@@ -328,7 +329,7 @@ string CLogFile::Line(const PS_DISPLAY_SETTINGS &options)
 		lineText = options.file;
 
 		char temp[8];
-		itoa(options.line, temp, 10);
+		_itoa(options.line, temp, 10);
 		lineText += ", Line ";
 		lineText += temp;
 		lineText += ": ";
@@ -352,4 +353,4 @@ string CLogFile::Date(const PS_DISPLAY_SETTINGS &options)
 	}
 
 	return dateText;	
-}
\ No newline at end of file
+}
diff --git a/source/ps/Parser.cpp b/source/ps/Parser.cpp
index af970fd5b3..ce45b4a57d 100755
--- a/source/ps/Parser.cpp
+++ b/source/ps/Parser.cpp
@@ -143,7 +143,7 @@ _bool CParserValue::GetDouble(_double &ret)
 		// Check if a digit is found
 		if (m_String[i] >= '0' && m_String[i] <= '9')
 		{
-			TempRet += (m_String[i]-'0')*pow(10,(DecimalPos-i-1));
+			TempRet += (m_String[i]-'0')*pow(double(10),(DecimalPos-i-1));
 		}
 		else
 		{
@@ -162,7 +162,7 @@ _bool CParserValue::GetDouble(_double &ret)
 		// Check if a digit is found
 		if (m_String[i] >= '0' && m_String[i] <= '9')
 		{
-			TempRet += (m_String[i]-'0')*pow(10,DecimalPos-i);
+			TempRet += (m_String[i]-'0')*pow(double(10),DecimalPos-i);
 		}
 		// It will accept and ending f, like 1.0f
 		else if (!(i==Size-1 && m_String[i] == 'f'))
@@ -1007,4 +1007,4 @@ _bool CParser::InputTaskType(const string& strName, const string& strSyntax)
 	}
 
 	return !Error;
-}
\ No newline at end of file
+}