diff --git a/src/net/StaticSocketAddress.hxx b/src/net/StaticSocketAddress.hxx
index 50f6eb5a0..b3702ec4d 100644
--- a/src/net/StaticSocketAddress.hxx
+++ b/src/net/StaticSocketAddress.hxx
@@ -88,6 +88,7 @@ public:
 	}
 
 	void Clear() noexcept {
+		size = sizeof(address.ss_family);
 		address.ss_family = AF_UNSPEC;
 	}