diff --git a/rtl/eth_phy_10g_rx_ber_mon.v b/rtl/eth_phy_10g_rx_ber_mon.v
index f2ba8d450..4850f8d37 100644
--- a/rtl/eth_phy_10g_rx_ber_mon.v
+++ b/rtl/eth_phy_10g_rx_ber_mon.v
@@ -59,7 +59,7 @@ initial begin
     end
 end
 
-parameter COUNT_WIDTH = $clog2(COUNT_125US);
+parameter COUNT_WIDTH = $clog2($rtoi(COUNT_125US));
 
 localparam [1:0]
     SYNC_DATA = 2'b10,
diff --git a/rtl/eth_phy_10g_rx_watchdog.v b/rtl/eth_phy_10g_rx_watchdog.v
index c644de439..bbf1b6ad4 100644
--- a/rtl/eth_phy_10g_rx_watchdog.v
+++ b/rtl/eth_phy_10g_rx_watchdog.v
@@ -68,7 +68,7 @@ initial begin
     end
 end
 
-parameter COUNT_WIDTH = $clog2(COUNT_125US);
+parameter COUNT_WIDTH = $clog2($rtoi(COUNT_125US));
 
 localparam [1:0]
     SYNC_DATA = 2'b10,