diff --git a/techlibs/common/simlib.v b/techlibs/common/simlib.v
index 028e4e5a9..6e39aa60a 100644
--- a/techlibs/common/simlib.v
+++ b/techlibs/common/simlib.v
@@ -2224,10 +2224,10 @@ module \$print (EN, TRG, ARGS);
 parameter PRIORITY = 0;
 
 parameter FORMAT = "";
-parameter ARGS_WIDTH = 0;
+parameter signed ARGS_WIDTH = 0;
 
 parameter TRG_ENABLE = 1;
-parameter TRG_WIDTH = 0;
+parameter signed TRG_WIDTH = 0;
 parameter TRG_POLARITY = 0;
 
 input EN;
diff --git a/tests/cxxrtl/test_value_fuzz.cc b/tests/cxxrtl/test_value_fuzz.cc
index 7e8fbb0a9..a77120136 100644
--- a/tests/cxxrtl/test_value_fuzz.cc
+++ b/tests/cxxrtl/test_value_fuzz.cc
@@ -241,7 +241,10 @@ struct CtlzTest
 	{
 		if (a == 0)
 			return bits;
-		return __builtin_clzl(a) - (64 - bits);
+		if (sizeof(long) == 4)
+			return __builtin_clzll(a) - (64 - bits);
+		else
+			return __builtin_clzl(a) - (64 - bits);
 	}
 
 	template<size_t Bits>