diff --git a/fpga/mqnic/VCU1525/fpga_100g/fpga.xdc b/fpga/mqnic/VCU1525/fpga_100g/fpga.xdc
index d73aa3234..c29887600 100644
--- a/fpga/mqnic/VCU1525/fpga_100g/fpga.xdc
+++ b/fpga/mqnic/VCU1525/fpga_100g/fpga.xdc
@@ -5,10 +5,13 @@
 set_property CFGBVS GND                                [current_design]
 set_property CONFIG_VOLTAGE 1.8                        [current_design]
 set_property BITSTREAM.GENERAL.COMPRESS true           [current_design]
-set_property BITSTREAM.CONFIG.EXTMASTERCCLK_EN {DIV-1} [current_design]
+set_property BITSTREAM.CONFIG.CONFIGFALLBACK ENABLE    [current_design]
+set_property BITSTREAM.CONFIG.EXTMASTERCCLK_EN DISABLE [current_design]
+set_property BITSTREAM.CONFIG.CONFIGRATE 85.0          [current_design]
 set_property BITSTREAM.CONFIG.SPI_32BIT_ADDR YES       [current_design]
 set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4           [current_design]
 set_property BITSTREAM.CONFIG.SPI_FALL_EDGE YES        [current_design]
+set_property BITSTREAM.CONFIG.UNUSEDPIN PULLUP         [current_design]
 
 # System clocks
 # 300 MHz (DDR 0)
diff --git a/fpga/mqnic/VCU1525/fpga_10g/fpga.xdc b/fpga/mqnic/VCU1525/fpga_10g/fpga.xdc
index 688a243d0..91f022bf2 100644
--- a/fpga/mqnic/VCU1525/fpga_10g/fpga.xdc
+++ b/fpga/mqnic/VCU1525/fpga_10g/fpga.xdc
@@ -5,10 +5,13 @@
 set_property CFGBVS GND                                [current_design]
 set_property CONFIG_VOLTAGE 1.8                        [current_design]
 set_property BITSTREAM.GENERAL.COMPRESS true           [current_design]
-set_property BITSTREAM.CONFIG.EXTMASTERCCLK_EN {DIV-1} [current_design]
+set_property BITSTREAM.CONFIG.CONFIGFALLBACK ENABLE    [current_design]
+set_property BITSTREAM.CONFIG.EXTMASTERCCLK_EN DISABLE [current_design]
+set_property BITSTREAM.CONFIG.CONFIGRATE 85.0          [current_design]
 set_property BITSTREAM.CONFIG.SPI_32BIT_ADDR YES       [current_design]
 set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4           [current_design]
 set_property BITSTREAM.CONFIG.SPI_FALL_EDGE YES        [current_design]
+set_property BITSTREAM.CONFIG.UNUSEDPIN PULLUP         [current_design]
 
 # System clocks
 # 300 MHz (DDR 0)