diff --git a/driver-icarus.c b/driver-icarus.c
index 334dc11a..46c2c54e 100644
--- a/driver-icarus.c
+++ b/driver-icarus.c
@@ -246,6 +246,8 @@ static void icarus_detect()
 		s = iter->string;
 		if (!strncmp("icarus:", iter->string, 7))
 			s += 7;
+		if (!strcmp(s, "auto"))
+			continue;
 		if (icarus_detect_one(s))
 			string_elist_del(iter);
 	}