diff --git a/neo/d3xp/Game_local.cpp b/neo/d3xp/Game_local.cpp
index af14c75..d759202 100644
--- a/neo/d3xp/Game_local.cpp
+++ b/neo/d3xp/Game_local.cpp
@@ -71,7 +71,7 @@ const char *idGameLocal::sufaceTypeNames[ MAX_SURFACE_TYPES ] = {
 
 #ifdef _D3XP
 // List of all defs used by the player that will stay on the fast timeline
-static char* fastEntityList[] = {
+static const char* fastEntityList[] = {
 	"player_doommarine",
 		"weapon_chainsaw",
 		"weapon_fists",
diff --git a/neo/d3xp/Item.cpp b/neo/d3xp/Item.cpp
index f1357bd..17521c6 100644
--- a/neo/d3xp/Item.cpp
+++ b/neo/d3xp/Item.cpp
@@ -772,7 +772,7 @@ void idItemTeam::Spawn( void ) {
 idItemTeam::LoadScript
 ===============
 */
-function_t * idItemTeam::LoadScript( char * script ) {
+function_t * idItemTeam::LoadScript( const char * script ) {
 	function_t * function = NULL;
 	idStr funcname = spawnArgs.GetString( script, "" );
 	if ( funcname.Length() ) {
diff --git a/neo/d3xp/Item.h b/neo/d3xp/Item.h
index e609e22..f7583a5 100644
--- a/neo/d3xp/Item.h
+++ b/neo/d3xp/Item.h
@@ -257,7 +257,7 @@ private:
 	void					Event_FlagCapture( void );
 
 	void					PrivateReturn( void );
-	function_t *			LoadScript( char * script );
+	function_t *			LoadScript( const char * script );
 
 	void					SpawnNugget( idVec3 pos );
     void                    UpdateGuis( void );
diff --git a/neo/d3xp/MultiplayerGame.cpp b/neo/d3xp/MultiplayerGame.cpp
index 1105268..62a7a10 100644
--- a/neo/d3xp/MultiplayerGame.cpp
+++ b/neo/d3xp/MultiplayerGame.cpp
@@ -4230,7 +4230,7 @@ idMultiplayerGame::GetTeamFlag
 ================
 */
 void idMultiplayerGame::FindTeamFlags( void ) {
-	char * flagDefs[2] =
+	const char * flagDefs[2] =
 	{
 		"team_CTF_redflag",
 		"team_CTF_blueflag"
diff --git a/neo/d3xp/gamesys/SysCmds.cpp b/neo/d3xp/gamesys/SysCmds.cpp
index 7b32cef..9a0f8ef 100644
--- a/neo/d3xp/gamesys/SysCmds.cpp
+++ b/neo/d3xp/gamesys/SysCmds.cpp
@@ -446,7 +446,7 @@ argv(0) god
 ==================
 */
 void Cmd_God_f( const idCmdArgs &args ) {
-	char		*msg;
+	const char	*msg;
 	idPlayer	*player;
 
 	player = gameLocal.GetLocalPlayer();
@@ -475,7 +475,7 @@ argv(0) notarget
 ==================
 */
 void Cmd_Notarget_f( const idCmdArgs &args ) {
-	char		*msg;
+	const char	*msg;
 	idPlayer	*player;
 
 	player = gameLocal.GetLocalPlayer();
@@ -502,7 +502,7 @@ argv(0) noclip
 ==================
 */
 void Cmd_Noclip_f( const idCmdArgs &args ) {
-	char		*msg;
+	const char	*msg;
 	idPlayer	*player;
 
 	player = gameLocal.GetLocalPlayer();
diff --git a/neo/d3xp/script/Script_Compiler.cpp b/neo/d3xp/script/Script_Compiler.cpp
index 183c9dd..48af6e0 100644
--- a/neo/d3xp/script/Script_Compiler.cpp
+++ b/neo/d3xp/script/Script_Compiler.cpp
@@ -38,7 +38,7 @@ If you have questions concerning this license or the applicable additional terms
 #define TOP_PRIORITY		7
 
 bool idCompiler::punctuationValid[ 256 ];
-char *idCompiler::punctuation[] = {
+const char *idCompiler::punctuation[] = {
 	"+=", "-=", "*=", "/=", "%=", "&=", "|=", "++", "--",
 	"&&", "||", "<=", ">=", "==", "!=", "::", ";",  ",",
 	"~",  "!",  "*",  "/",  "%",  "(",   ")",  "-", "+",
diff --git a/neo/d3xp/script/Script_Compiler.h b/neo/d3xp/script/Script_Compiler.h
index 51b5918..5a62ddc 100644
--- a/neo/d3xp/script/Script_Compiler.h
+++ b/neo/d3xp/script/Script_Compiler.h
@@ -31,8 +31,8 @@ If you have questions concerning this license or the applicable additional terms
 const char * const RESULT_STRING = "<RESULT>";
 
 typedef struct opcode_s {
-	char		*name;
-	char		*opname;
+	const char	*name;
+	const char	*opname;
 	int			priority;
 	bool		rightAssociative;
 	idVarDef	*type_a;
@@ -197,7 +197,7 @@ enum {
 class idCompiler {
 private:
 	static bool		punctuationValid[ 256 ];
-	static char		*punctuation[];
+	static const char	*punctuation[];
 
 	idParser		parser;
 	idParser		*parserPtr;
diff --git a/neo/d3xp/script/Script_Interpreter.cpp b/neo/d3xp/script/Script_Interpreter.cpp
index 6e07931..de63e7b 100644
--- a/neo/d3xp/script/Script_Interpreter.cpp
+++ b/neo/d3xp/script/Script_Interpreter.cpp
@@ -425,7 +425,7 @@ idInterpreter::Error
 Aborts the currently executing function
 ============
 */
-void idInterpreter::Error( char *fmt, ... ) const {
+void idInterpreter::Error( const char *fmt, ... ) const {
 	va_list argptr;
 	char	text[ 1024 ];
 
@@ -450,7 +450,7 @@ idInterpreter::Warning
 Prints file and line number information with warning.
 ============
 */
-void idInterpreter::Warning( char *fmt, ... ) const {
+void idInterpreter::Warning( const char *fmt, ... ) const {
 	va_list argptr;
 	char	text[ 1024 ];
 
diff --git a/neo/d3xp/script/Script_Interpreter.h b/neo/d3xp/script/Script_Interpreter.h
index d0ab7a9..a1e650a 100644
--- a/neo/d3xp/script/Script_Interpreter.h
+++ b/neo/d3xp/script/Script_Interpreter.h
@@ -93,8 +93,8 @@ public:
 	int					CurrentLine( void ) const;
 	const char			*CurrentFile( void ) const;
 
-	void				Error( char *fmt, ... ) const id_attribute((format(printf,2,3)));
-	void				Warning( char *fmt, ... ) const id_attribute((format(printf,2,3)));
+	void				Error( const char *fmt, ... ) const id_attribute((format(printf,2,3)));
+	void				Warning( const char *fmt, ... ) const id_attribute((format(printf,2,3)));
 	void				DisplayInfo( void ) const;
 
 	bool				BeginMultiFrameEvent( idEntity *ent, const idEventDef *event );
diff --git a/neo/idlib/Lexer.h b/neo/idlib/Lexer.h
index ea73cf1..9ff408c 100644
--- a/neo/idlib/Lexer.h
+++ b/neo/idlib/Lexer.h
@@ -129,7 +129,7 @@ typedef enum {
 // punctuation
 typedef struct punctuation_s
 {
-	char *p;						// punctuation character(s)
+	const char *p;						// punctuation character(s)
 	int n;							// punctuation id
 } punctuation_t;
 
diff --git a/neo/idlib/Parser.cpp b/neo/idlib/Parser.cpp
index b3cb717..33af7a8 100644
--- a/neo/idlib/Parser.cpp
+++ b/neo/idlib/Parser.cpp
@@ -625,7 +625,7 @@ void idParser::AddBuiltinDefines( void ) {
 	define_t *define;
 	struct builtin
 	{
-		char *string;
+		const char *string;
 		int id;
 	} builtin[] = {
 		{ "__LINE__",	BUILTIN_LINE }, 
diff --git a/neo/idlib/math/Simd.cpp b/neo/idlib/math/Simd.cpp
index d887052..989a450 100644
--- a/neo/idlib/math/Simd.cpp
+++ b/neo/idlib/math/Simd.cpp
@@ -312,7 +312,7 @@ TIME_TYPE time_in_millisec( void ) {
 PrintClocks
 ============
 */
-void PrintClocks( char *string, int dataCount, int clocks, int otherClocks = 0 ) {
+void PrintClocks( const char *string, int dataCount, int clocks, int otherClocks = 0 ) {
 	int i;
 
 	idLib::common->Printf( string );