diff --git a/common/xash3d_types.h b/common/xash3d_types.h
index 650c5fc8..71ceca77 100644
--- a/common/xash3d_types.h
+++ b/common/xash3d_types.h
@@ -145,7 +145,7 @@ typedef struct dll_info_s
 	void		*link;	// hinstance of loading library
 } dll_info_t;
 
-typedef void (*setpair_t)( const char *key, const void *value, void *buffer, void *numpairs );
+typedef void (*setpair_t)( const char *key, const void *value, const void *buffer, void *numpairs );
 
 // config strings are a general means of communication from
 // the server to all connected clients.
diff --git a/engine/client/s_vox.c b/engine/client/s_vox.c
index 93595683..73818943 100644
--- a/engine/client/s_vox.c
+++ b/engine/client/s_vox.c
@@ -21,7 +21,7 @@ GNU General Public License for more details.
 
 static int cszrawsentences = 0;
 static char *rgpszrawsentence[CVOXFILESENTENCEMAX];
-static char *voxperiod = "_period", *voxcomma = "_comma";
+static const char *voxperiod = "_period", *voxcomma = "_comma";
 
 // return number of samples mixed
 int VOX_MixDataToDevice( channel_t *pchan, int sampleCount, int outputRate, int outputOffset )
@@ -248,8 +248,8 @@ static int VOX_ParseString( char *psz, char *rgpparseword[CVOXWORDMAX] )
 			psz[1] != '\n' && psz[1] != '\r' && psz[1] != '\0' )
 		{
 			if( *psz == '.' )
-				rgpparseword[i++] = voxperiod;
-			else rgpparseword[i++] = voxcomma;
+				rgpparseword[i++] = (char *)voxperiod;
+			else rgpparseword[i++] = (char *)voxcomma;
 
 			if( i >= CVOXWORDMAX )
 				return i;
@@ -457,7 +457,7 @@ static void VOX_ReadSentenceFile_( byte *buf, fs_offset_t size )
 	}
 }
 
-static void VOX_ReadSentenceFile( char *path )
+static void VOX_ReadSentenceFile( const char *path )
 {
 	byte *buf;
 	fs_offset_t size;
@@ -529,11 +529,11 @@ static void Test_VOX_LookupString( void )
 
 	VOX_Shutdown();
 
-	rgpszrawsentence[cszrawsentences++] = "exactmatch\000123";
-	rgpszrawsentence[cszrawsentences++] = "CaseInsensitive\000456";
-	rgpszrawsentence[cszrawsentences++] = "SentenceWithTabs\0\t\t\t789";
-	rgpszrawsentence[cszrawsentences++] = "SentenceWithSpaces\0  SPAAACE";
-	rgpszrawsentence[cszrawsentences++] = "SentenceWithTabsAndSpaces\0\t \t\t MEOW";
+	rgpszrawsentence[cszrawsentences++] = (char*)"exactmatch\000123";
+	rgpszrawsentence[cszrawsentences++] = (char*)"CaseInsensitive\000456";
+	rgpszrawsentence[cszrawsentences++] = (char*)"SentenceWithTabs\0\t\t\t789";
+	rgpszrawsentence[cszrawsentences++] = (char*)"SentenceWithSpaces\0  SPAAACE";
+	rgpszrawsentence[cszrawsentences++] = (char*)"SentenceWithTabsAndSpaces\0\t \t\t MEOW";
 
 	for( i = 0; i < sizeof( data ) / sizeof( data[0] ); i += 2 )
 	{
diff --git a/engine/common/base_cmd.c b/engine/common/base_cmd.c
index b1685626..efdf718e 100644
--- a/engine/common/base_cmd.c
+++ b/engine/common/base_cmd.c
@@ -229,7 +229,7 @@ void BaseCmd_Stats_f( void )
 	Con_Printf( "Empty buckets: %d\n", empty );
 }
 
-static void BaseCmd_CheckCvars( const char *key, const char *value, void *buffer, void *ptr )
+static void BaseCmd_CheckCvars( const char *key, const char *value, const void *unused, void *ptr )
 {
 	base_command_t *v = BaseCmd_Find( HM_CVAR, key );
 	qboolean *invalid = ptr;
diff --git a/engine/server/sv_game.c b/engine/server/sv_game.c
index c236840f..588bc7d8 100644
--- a/engine/server/sv_game.c
+++ b/engine/server/sv_game.c
@@ -3842,7 +3842,7 @@ char *pfnGetInfoKeyBuffer( edict_t *e )
 	if(( cl = SV_ClientFromEdict( e, false )) != NULL )
 		return cl->userinfo;
 
-	return ""; // assume error
+	return (char*)""; // assume error
 }
 
 /*
@@ -4807,7 +4807,7 @@ qboolean SV_ParseEdict( char **pfile, edict_t *ent )
 		if( !token[0] ) continue;
 
 		// create keyvalue strings
-		pkvd[numpairs].szClassName = ""; // unknown at this moment
+		pkvd[numpairs].szClassName = (char*)""; // unknown at this moment
 		pkvd[numpairs].szKeyName = copystring( keyname );
 		pkvd[numpairs].szValue = copystring( token );
 		pkvd[numpairs].fHandled = false;
@@ -4845,8 +4845,8 @@ qboolean SV_ParseEdict( char **pfile, edict_t *ent )
 	{
 		if( numpairs < 256 )
 		{
-			pkvd[numpairs].szClassName = "custom";
-			pkvd[numpairs].szKeyName = "customclass";
+			pkvd[numpairs].szClassName = (char*)"custom";
+			pkvd[numpairs].szKeyName = (char*)"customclass";
 			pkvd[numpairs].szValue = classname;
 			pkvd[numpairs].fHandled = false;
 			numpairs++;
diff --git a/engine/server/sv_log.c b/engine/server/sv_log.c
index 4f6050c2..7c1c5d6b 100644
--- a/engine/server/sv_log.c
+++ b/engine/server/sv_log.c
@@ -136,7 +136,7 @@ void Log_Printf( const char *fmt, ... )
 	}
 }
 
-static void Log_PrintServerCvar( const char *var_name, const char *var_value, void *unused2, void *unused3 )
+static void Log_PrintServerCvar( const char *var_name, const char *var_value, const void *unused2, void *unused3 )
 {
 	Log_Printf( "Server cvar \"%s\" = \"%s\"\n", var_name, var_value );
 }