diff --git a/src/netbase.h b/src/netbase.h
index 8d5135e970..e1f80b4ee8 100644
--- a/src/netbase.h
+++ b/src/netbase.h
@@ -54,7 +54,7 @@ class CNetAddr
         bool IsRFC3849() const; // IPv6 documentation address (2001:0DB8::/32)
         bool IsRFC3927() const; // IPv4 autoconfig (169.254.0.0/16)
         bool IsRFC3964() const; // IPv6 6to4 tunnelling (2002::/16)
-        bool IsRFC4193() const; // IPv6 unique local (FC00::/15)
+        bool IsRFC4193() const; // IPv6 unique local (FC00::/7)
         bool IsRFC4380() const; // IPv6 Teredo tunnelling (2001::/32)
         bool IsRFC4843() const; // IPv6 ORCHID (2001:10::/28)
         bool IsRFC4862() const; // IPv6 autoconfig (FE80::/64)