diff --git a/style/roads.mss b/style/roads.mss
index 817bce10b3..64e64469e3 100644
--- a/style/roads.mss
+++ b/style/roads.mss
@@ -1522,42 +1522,40 @@ tertiary is rendered from z10 and is not included in osm_planet_roads. */
           line-width: @secondary-width-z12 - 2 * @secondary-casing-width-z12;
           line-cap: round;
           line-join: round;
-          [zoom >= 13] {
-            [zoom >= 13] { line-width: @secondary-width-z13 - 2 * @secondary-casing-width-z13; }
-            [zoom >= 14] { line-width: @secondary-width-z14 - 2 * @secondary-casing-width-z14; }
-            [zoom >= 15] { line-width: @secondary-width-z15 - 2 * @secondary-casing-width-z15; }
-            [zoom >= 16] { line-width: @secondary-width-z16 - 2 * @secondary-casing-width-z16; }
-            [zoom >= 17] { line-width: @secondary-width-z17 - 2 * @secondary-casing-width-z17; }
-            [zoom >= 18] { line-width: @secondary-width-z18 - 2 * @secondary-casing-width-z18; }
-            [zoom >= 19] { line-width: @secondary-width-z19 - 2 * @secondary-casing-width-z19; }
+          [zoom >= 13] { line-width: @secondary-width-z13 - 2 * @secondary-casing-width-z13; }
+          [zoom >= 14] { line-width: @secondary-width-z14 - 2 * @secondary-casing-width-z14; }
+          [zoom >= 15] { line-width: @secondary-width-z15 - 2 * @secondary-casing-width-z15; }
+          [zoom >= 16] { line-width: @secondary-width-z16 - 2 * @secondary-casing-width-z16; }
+          [zoom >= 17] { line-width: @secondary-width-z17 - 2 * @secondary-casing-width-z17; }
+          [zoom >= 18] { line-width: @secondary-width-z18 - 2 * @secondary-casing-width-z18; }
+          [zoom >= 19] { line-width: @secondary-width-z19 - 2 * @secondary-casing-width-z19; }
+          [link = 'yes'] {
+            line-width: @secondary-link-width-z12 - 2 * @casing-width-z12;
+            [zoom >= 13] { line-width: @secondary-link-width-z13 - 2 * @casing-width-z13; }
+            [zoom >= 15] { line-width: @secondary-link-width-z15 - 2 * @casing-width-z15; }
+            [zoom >= 17] { line-width: @secondary-link-width-z17 - 2 * @casing-width-z17; }
+            [zoom >= 18] { line-width: @secondary-link-width-z18 - 2 * @casing-width-z18; }
+            [zoom >= 19] { line-width: @secondary-link-width-z19 - 2 * @casing-width-z19; }
+          }
+          #tunnels {
+            line-color: @secondary-tunnel-fill;
+          }
+          #bridges {
+            line-width: @secondary-width-z12 - 2 * @bridge-casing-width-z12;
+            [zoom >= 13] { line-width: @secondary-width-z13 - 2 * @major-bridge-casing-width-z13; }
+            [zoom >= 14] { line-width: @secondary-width-z14 - 2 * @major-bridge-casing-width-z14; }
+            [zoom >= 15] { line-width: @secondary-width-z15 - 2 * @major-bridge-casing-width-z15; }
+            [zoom >= 16] { line-width: @secondary-width-z16 - 2 * @major-bridge-casing-width-z16; }
+            [zoom >= 17] { line-width: @secondary-width-z17 - 2 * @major-bridge-casing-width-z17; }
+            [zoom >= 18] { line-width: @secondary-width-z18 - 2 * @major-bridge-casing-width-z18; }
+            [zoom >= 19] { line-width: @secondary-width-z19 - 2 * @major-bridge-casing-width-z19; }
             [link = 'yes'] {
-              line-width: @secondary-link-width-z12 - 2 * @casing-width-z12;
-              [zoom >= 13] { line-width: @secondary-link-width-z13 - 2 * @casing-width-z13; }
-              [zoom >= 15] { line-width: @secondary-link-width-z15 - 2 * @casing-width-z15; }
-              [zoom >= 17] { line-width: @secondary-link-width-z17 - 2 * @casing-width-z17; }
-              [zoom >= 18] { line-width: @secondary-link-width-z18 - 2 * @casing-width-z18; }
-              [zoom >= 19] { line-width: @secondary-link-width-z19 - 2 * @casing-width-z19; }
-            }
-            #tunnels {
-              line-color: @secondary-tunnel-fill;
-            }
-            #bridges {
-              line-width: @secondary-width-z12 - 2 * @bridge-casing-width-z12;
-              [zoom >= 13] { line-width: @secondary-width-z13 - 2 * @major-bridge-casing-width-z13; }
-              [zoom >= 14] { line-width: @secondary-width-z14 - 2 * @major-bridge-casing-width-z14; }
-              [zoom >= 15] { line-width: @secondary-width-z15 - 2 * @major-bridge-casing-width-z15; }
-              [zoom >= 16] { line-width: @secondary-width-z16 - 2 * @major-bridge-casing-width-z16; }
-              [zoom >= 17] { line-width: @secondary-width-z17 - 2 * @major-bridge-casing-width-z17; }
-              [zoom >= 18] { line-width: @secondary-width-z18 - 2 * @major-bridge-casing-width-z18; }
-              [zoom >= 19] { line-width: @secondary-width-z19 - 2 * @major-bridge-casing-width-z19; }
-              [link = 'yes'] {
-                line-width: @secondary-link-width-z12 - 2 * @bridge-casing-width-z12;
-                [zoom >= 13] { line-width: @secondary-link-width-z13 - 2 * @bridge-casing-width-z13; }
-                [zoom >= 15] { line-width: @secondary-link-width-z15 - 2 * @bridge-casing-width-z15; }
-                [zoom >= 17] { line-width: @secondary-link-width-z17 - 2 * @bridge-casing-width-z17; }
-                [zoom >= 18] { line-width: @secondary-link-width-z18 - 2 * @bridge-casing-width-z18; }
-                [zoom >= 19] { line-width: @secondary-link-width-z19 - 2 * @bridge-casing-width-z19; }
-              }
+              line-width: @secondary-link-width-z12 - 2 * @bridge-casing-width-z12;
+              [zoom >= 13] { line-width: @secondary-link-width-z13 - 2 * @bridge-casing-width-z13; }
+              [zoom >= 15] { line-width: @secondary-link-width-z15 - 2 * @bridge-casing-width-z15; }
+              [zoom >= 17] { line-width: @secondary-link-width-z17 - 2 * @bridge-casing-width-z17; }
+              [zoom >= 18] { line-width: @secondary-link-width-z18 - 2 * @bridge-casing-width-z18; }
+              [zoom >= 19] { line-width: @secondary-link-width-z19 - 2 * @bridge-casing-width-z19; }
             }
           }
         }