diff --git a/src/Cedar/VLanUnix.c b/src/Cedar/VLanUnix.c
index 784bd74..127d15e 100644
--- a/src/Cedar/VLanUnix.c
+++ b/src/Cedar/VLanUnix.c
@@ -339,7 +339,7 @@ void GenerateTunName(char *name, char *prefix, char *tun_name, size_t tun_name_l
 	StrCpy(instance_name_lower, sizeof(instance_name_lower), name);
 	Trim(instance_name_lower);
 	StrLower(instance_name_lower);
-	Format(tun_name, tun_name_len, "%s_%s", prefix, instance_name_lower);
+	Format(tun_name, tun_name_len, "%s", instance_name_lower);
 
 	tun_name[15] = 0;
 }