diff --git a/style/roads.mss b/style/roads.mss
index c750ba2b97..5c8b75d8a0 100644
--- a/style/roads.mss
+++ b/style/roads.mss
@@ -1302,7 +1302,7 @@ tertiary is rendered from z10 and is not included in osm_planet_roads. */
             }
             [zoom >= 18] {
               line-width: 8;
-              b/line-width: 7
+              b/line-width: 7;
             }
           }
           [service = 'INT-minor'] {