diff --git a/fpga/generator/ddr4-vcu108.tcl b/fpga/generator/ddr4-vcu108.tcl
index 6035feb6d..876d4c4f4 100644
--- a/fpga/generator/ddr4-vcu108.tcl
+++ b/fpga/generator/ddr4-vcu108.tcl
@@ -7,6 +7,8 @@ set SYSTEMCLOCK $::env(SYSTEMCLOCK)
 
 set ipName ddr4
 
+set SYSTEMCLOCK_MHz [expr $SYSTEMCLOCK/1000000.0]
+
 create_project $ipName . -force -part $partNumber
 set_property board_part $boardName [current_project]
 
@@ -39,7 +41,7 @@ set_property -dict [list CONFIG.C0.ControllerType {DDR4_SDRAM} \
 			CONFIG.C0.DDR4_AxiNarrowBurst {false} \
 			CONFIG.Reference_Clock {Differential} \
 			CONFIG.ADDN_UI_CLKOUT1.INSERT_VIP {0} \
-			CONFIG.ADDN_UI_CLKOUT1_FREQ_HZ {$SYSTEMCLOCK} \
+			CONFIG.ADDN_UI_CLKOUT1_FREQ_HZ $SYSTEMCLOCK_MHz \
 			CONFIG.ADDN_UI_CLKOUT2.INSERT_VIP {0} \
 			CONFIG.ADDN_UI_CLKOUT2_FREQ_HZ {300} \
 			CONFIG.ADDN_UI_CLKOUT3.INSERT_VIP {0} \
diff --git a/fpga/generator/ddr4-vcu118.tcl b/fpga/generator/ddr4-vcu118.tcl
index 85ca64a4c..104dfb80d 100644
--- a/fpga/generator/ddr4-vcu118.tcl
+++ b/fpga/generator/ddr4-vcu118.tcl
@@ -7,6 +7,8 @@ set SYSTEMCLOCK $::env(CLOCK)
 
 set ipName ddr4
 
+set SYSTEMCLOCK_MHz [expr $SYSTEMCLOCK/1000000.0]
+
 create_project $ipName . -force -part $partNumber
 set_property board_part $boardName [current_project]
 
@@ -39,7 +41,7 @@ set_property -dict [list CONFIG.C0.ControllerType {DDR4_SDRAM} \
 			CONFIG.C0.DDR4_AxiNarrowBurst {false} \
 			CONFIG.Reference_Clock {Differential} \
 			CONFIG.ADDN_UI_CLKOUT1.INSERT_VIP {0} \
-			CONFIG.ADDN_UI_CLKOUT1_FREQ_HZ {$SYSTEMCLOCK} \
+			CONFIG.ADDN_UI_CLKOUT1_FREQ_HZ $SYSTEMCLOCK_MHz \
 			CONFIG.ADDN_UI_CLKOUT2.INSERT_VIP {0} \
 			CONFIG.ADDN_UI_CLKOUT2_FREQ_HZ {300} \
 			CONFIG.ADDN_UI_CLKOUT3.INSERT_VIP {0} \