diff --git a/target/lx9_jason/ice6502/board.ucf b/target/lx9_jason/ice6502/board.ucf
index 1d0b858..e13f1f7 100644
--- a/target/lx9_jason/ice6502/board.ucf
+++ b/target/lx9_jason/ice6502/board.ucf
@@ -71,4 +71,4 @@ NET "trig<0>"  LOC="P126" | IOSTANDARD = LVCMOS33                           ;
 NET "trig<1>"  LOC="P127" | IOSTANDARD = LVCMOS33                           ;
 
 # Jumpers
-NET "fakeTube_n" LOC="P123" | IOSTANDARD = LVCMOS33 ;
+NET "fakeTube_n" LOC="P112" | IOSTANDARD = LVCMOS33 | PULLUP ;
diff --git a/target/lx9_jason_flipped/ice6502/board.ucf b/target/lx9_jason_flipped/ice6502/board.ucf
index d50482a..8296005 100644
--- a/target/lx9_jason_flipped/ice6502/board.ucf
+++ b/target/lx9_jason_flipped/ice6502/board.ucf
@@ -71,4 +71,4 @@ NET "trig<0>"  LOC="P126" | IOSTANDARD = LVCMOS33                           ;
 NET "trig<1>"  LOC="P127" | IOSTANDARD = LVCMOS33                           ;
 
 # Jumpers
-NET "fakeTube_n" LOC="P123" | IOSTANDARD = LVCMOS33 ;
+NET "fakeTube_n" LOC="P112" | IOSTANDARD = LVCMOS33 | PULLUP ;