diff --git a/verilog/sd2snes/main.ucf b/verilog/sd2snes/main.ucf
index 4588d4f..67c55ed 100644
--- a/verilog/sd2snes/main.ucf
+++ b/verilog/sd2snes/main.ucf
@@ -535,6 +535,7 @@ NET "SD_DAT[3]" LOC = P63;
# PlanAhead Generated IO constraints
NET "SD_CLK" IOSTANDARD = LVCMOS33;
+NET "SD_CLK" PULLUP;
NET "SD_CMD" IOSTANDARD = LVCMOS33;
NET "SD_DAT[0]" IOSTANDARD = LVCMOS33;
NET "SD_DAT[1]" IOSTANDARD = LVCMOS33;
diff --git a/verilog/sd2snes/sd2snes.xise b/verilog/sd2snes/sd2snes.xise
index 23cc2c5..d3a44ac 100644
--- a/verilog/sd2snes/sd2snes.xise
+++ b/verilog/sd2snes/sd2snes.xise
@@ -377,8 +377,8 @@
-
-
+
+
diff --git a/verilog/sd2snes_cx4/main.ucf b/verilog/sd2snes_cx4/main.ucf
index d33fb74..4f1df7b 100644
--- a/verilog/sd2snes_cx4/main.ucf
+++ b/verilog/sd2snes_cx4/main.ucf
@@ -535,6 +535,7 @@ NET "SD_DAT[3]" LOC = P63;
# PlanAhead Generated IO constraints
NET "SD_CLK" IOSTANDARD = LVCMOS33;
+NET "SD_CLK" PULLUP;
NET "SD_CMD" IOSTANDARD = LVCMOS33;
NET "SD_DAT[0]" IOSTANDARD = LVCMOS33;
NET "SD_DAT[1]" IOSTANDARD = LVCMOS33;
diff --git a/verilog/sd2snes_cx4/sd2snes_cx4.xise b/verilog/sd2snes_cx4/sd2snes_cx4.xise
index 683e3fd..b71aa02 100644
--- a/verilog/sd2snes_cx4/sd2snes_cx4.xise
+++ b/verilog/sd2snes_cx4/sd2snes_cx4.xise
@@ -366,8 +366,8 @@
-
-
+
+