diff --git a/cores/Oric/source/oric_zxuno_v4.ucf b/cores/Oric/source/oric_zxuno_v4.ucf
index 646b37b..8038873 100644
--- a/cores/Oric/source/oric_zxuno_v4.ucf
+++ b/cores/Oric/source/oric_zxuno_v4.ucf
@@ -23,8 +23,8 @@ NET "K7_TAPEOUT"      LOC="P9"   | IOSTANDARD = LVCMOS33;
 NET "K7_TAPEIN"       LOC="P94"  | IOSTANDARD = LVCMOS33; 
 
 # Keyboard and mouse
-NET "PS2CLK1"         LOC="P99"  | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8;
-NET "PS2DAT1"         LOC="P98"  | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8;
+NET "PS2CLK1" LOC="P99" | IOSTANDARD = LVCMOS33 | PULLUP;
+NET "PS2DAT1" LOC="P98" | IOSTANDARD = LVCMOS33 | PULLUP;
 #NET "mouseclk"        LOC="P95"  | IOSTANDARD = LVCMOS33 | PULLUP;
 #NET "mousedata"       LOC="P97"  | IOSTANDARD = LVCMOS33 | PULLUP;