diff --git a/src/newgrf_house.cpp b/src/newgrf_house.cpp
--- a/src/newgrf_house.cpp
+++ b/src/newgrf_house.cpp
@@ -404,7 +404,7 @@ static uint32 GetDistanceFromNearbyHouse
 		}
 	}
 
-	DEBUG(grf, 1, "Unhandled house variable 0x%X", variable);
+	Debug(grf, 1, "Unhandled house variable 0x{:X}", variable);
 
 	*available = false;
 	return UINT_MAX;