diff --git a/src/devices/system.h b/src/devices/system.h
index 6fc31e1..87923e0 100644
--- a/src/devices/system.h
+++ b/src/devices/system.h
@@ -10,7 +10,6 @@ WITH REGARD TO THIS SOFTWARE.
 */
 
 #define RAM_PAGES 0x10
-#define PEEK16(d) ((d)[0] << 8 | (d)[1])
 
 int system_load(Uxn *u, char *filename);
 void system_deo(Uxn *u, Uint8 *d, Uint8 port);