diff --git a/src/devices/system.c b/src/devices/system.c
index 831c2cc..89a2f96 100644
--- a/src/devices/system.c
+++ b/src/devices/system.c
@@ -91,12 +91,12 @@ system_boot(Uint8 *ram, char *rom)
 /* IO */
 
 Uint8
-system_dei(Uxn *u, Uint8 addr)
+system_dei(Uint8 addr)
 {
 	switch(addr) {
-	case 0x4: return u->wst.ptr;
-	case 0x5: return u->rst.ptr;
-	default: return u->dev[addr];
+	case 0x4: return uxn.wst.ptr;
+	case 0x5: return uxn.rst.ptr;
+	default: return uxn.dev[addr];
 	}
 }
 
diff --git a/src/devices/system.h b/src/devices/system.h
index 61195f1..39643ba 100644
--- a/src/devices/system.h
+++ b/src/devices/system.h
@@ -17,7 +17,7 @@ void system_inspect();
 int system_error(char *msg, const char *err);
 int system_boot(Uint8 *ram, char *rom);
 
-Uint8 system_dei(Uxn *u, Uint8 addr);
+Uint8 system_dei(Uint8 addr);
 void system_deo(Uxn *u, Uint8 *d, Uint8 port);
 
 extern char *boot_rom;
\ No newline at end of file
diff --git a/src/uxn11.c b/src/uxn11.c
index a3f1ca0..df17a22 100644
--- a/src/uxn11.c
+++ b/src/uxn11.c
@@ -48,7 +48,7 @@ Uint8
 emu_dei(Uint8 addr)
 {
 	switch(addr & 0xf0) {
-	case 0x00: return system_dei(&uxn, addr);
+	case 0x00: return system_dei(addr);
 	case 0x10: return console_dei(&uxn, addr);
 	case 0x20: return screen_dei(addr);
 	case 0xc0: return datetime_dei(addr);
diff --git a/src/uxncli.c b/src/uxncli.c
index 5780ec4..2c07965 100644
--- a/src/uxncli.c
+++ b/src/uxncli.c
@@ -24,7 +24,7 @@ Uint8
 emu_dei(Uint8 addr)
 {
 	switch(addr & 0xf0) {
-	case 0x00: return system_dei(&uxn, addr);
+	case 0x00: return system_dei(addr);
 	case 0x10: return console_dei(&uxn, addr);
 	case 0xc0: return datetime_dei(addr);
 	}