diff --git a/lib/remote/apilistener.cpp b/lib/remote/apilistener.cpp
index 424c63004..510323588 100644
--- a/lib/remote/apilistener.cpp
+++ b/lib/remote/apilistener.cpp
@@ -1190,12 +1190,12 @@ void ApiListener::ValidateTlsProtocolmin(const String& value, const ValidationUt
 	    value != SSL_TXT_TLSV1_2
 #endif /* SSL_TXT_TLSV1_1 */
 	    ) {
-		BOOST_THROW_EXCEPTION(ValidationError(this, boost::assign::list_of("tls_protocolmin"), "Invalid TLS version. "
-		    "Must be one of '" SSL_TXT_TLSV1 "'"
+		String message = "Invalid TLS version. Must be one of '" SSL_TXT_TLSV1 "'";
 #ifdef SSL_TXT_TLSV1_1
-		    ", '" SSL_TXT_TLSV1_1 "' or '" SSL_TXT_TLSV1_2 "'"
+		message += ", '" SSL_TXT_TLSV1_1 "' or '" SSL_TXT_TLSV1_2 "'";
 #endif /* SSL_TXT_TLSV1_1 */
-		    ));
+
+		BOOST_THROW_EXCEPTION(ValidationError(this, boost::assign::list_of("tls_protocolmin"), message));
 	}
 }