diff --git a/backends/blif/blif.cc b/backends/blif/blif.cc
index 4a512197..3a4618a9 100644
--- a/backends/blif/blif.cc
+++ b/backends/blif/blif.cc
@@ -82,7 +82,7 @@ struct BlifDumper
 
 		std::string str = RTLIL::unescape_id(sig.wire->name);
 		for (size_t i = 0; i < str.size(); i++)
-			if (str[i] == '#' || str[i] == '=')
+			if (str[i] == '#' || str[i] == '=' || str[i] == '<' || str[i] == '>')
 				str[i] = '?';
 
 		if (sig.wire->width != 1)