add default nettype none
diff --git a/verilog/rtl/counter_timer_high.v b/verilog/rtl/counter_timer_high.v
index 76db8b9..b66ee6b 100755
--- a/verilog/rtl/counter_timer_high.v
+++ b/verilog/rtl/counter_timer_high.v
@@ -1,3 +1,4 @@
+`default_nettype none
 /* Simple 32-bit counter-timer for Caravel. */
 
 /* Counter acts as high 32 bits of a 64-bit counter