diff --git a/src/rtnetlink.hpp b/src/rtnetlink.hpp
index f35c25f..821b811 100644
--- a/src/rtnetlink.hpp
+++ b/src/rtnetlink.hpp
@@ -10,8 +10,8 @@
 
 InterfaceInfo intfFromRtm(std::string_view msg);
 
-std::optional<std::tuple<unsigned, stdplus::InAnyAddr>>
-    gatewayFromRtm(std::string_view msg);
+std::optional<std::tuple<unsigned, stdplus::InAnyAddr>> gatewayFromRtm(
+    std::string_view msg);
 
 AddressInfo addrFromRtm(std::string_view msg);