diff --git a/sysdata/programs/ps2_driver/src/controller.hb b/sysdata/programs/ps2_driver/src/controller.hb
index c7767dbe3..497b46079 100644
--- a/sysdata/programs/ps2_driver/src/controller.hb
+++ b/sysdata/programs/ps2_driver/src/controller.hb
@@ -7,7 +7,7 @@ port2 := @as(Port, PORT_AT_STARTUP)
 
 //wiki.osdev.org/"8042"_PS/2_Controller#PS/2_Controller_IO_Ports
 $CONTROLLER_PORT := 0x64
-$DATA_PORT := 0x60n
+$DATA_PORT := 0x60
 
 $disable_port1 := fn(): void memory.outb(CONTROLLER_PORT, 0xAD)
 $enable_port1 := fn(): void memory.outb(CONTROLLER_PORT, 0xAE)