diff --git a/common/2d/2dsline.c b/common/2d/2dsline.c
index 0972719b9..bf4fb03f4 100644
--- a/common/2d/2dsline.c
+++ b/common/2d/2dsline.c
@@ -18,12 +18,10 @@ COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  */
 
 #include <string.h>
-#include "u_mem.h"
 #include "gr.h"
 #include "grdef.h"
-#include "dxxerror.h"
 
-void gr_linear_darken(ubyte * dest, int darkening_level, int count, ubyte * fade_table) {
+static void gr_linear_darken(ubyte * dest, int darkening_level, int count, ubyte * fade_table) {
 	register int i;
 
 	for (i=0;i<count;i++)
@@ -33,7 +31,7 @@ void gr_linear_darken(ubyte * dest, int darkening_level, int count, ubyte * fade
 	}
 }
 
-void gr_linear_stosd( ubyte * dest, unsigned char color, unsigned int nbytes) {
+static void gr_linear_stosd( ubyte * dest, unsigned char color, unsigned int nbytes) {
 	memset(dest,color,nbytes);
 }
 
diff --git a/common/include/grdef.h b/common/include/grdef.h
index 081876de9..8964c7371 100644
--- a/common/include/grdef.h
+++ b/common/include/grdef.h
@@ -29,10 +29,6 @@ extern void gr_pal_setblock( int start, int n, unsigned char * palette );
 extern void gr_pal_getblock( int start, int n, unsigned char * palette );
 extern void gr_pal_setone( int index, unsigned char red, unsigned char green, unsigned char blue );
 
-void gr_linear_movsb( ubyte * source, ubyte * dest, int nbytes);
-void gr_linear_movsw( ubyte * source, ubyte * dest, int nbytes);
-void gr_linear_stosd( ubyte * dest, unsigned char color, unsigned int nbytes);
-
 extern unsigned int gr_var_color;
 extern unsigned int gr_var_bwidth;
 extern unsigned char * gr_var_bitmap;