diff --git a/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.js b/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.js
index 1c018de..2146d9d 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.js
+++ b/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.js
@@ -139,7 +139,10 @@
       },
       /** @type {?} */
       patchRange: Object,
-      path: String,
+      path: {
+        type: String,
+        observer: '_pathObserver',
+      },
       prefs: {
         type: Object,
         observer: '_prefsObserver',
@@ -636,6 +639,11 @@
       }
     },
 
+    _pathObserver() {
+      // Call _prefsChanged(), because line-limit style value depends on path.
+      this._prefsChanged(this.prefs);
+    },
+
     _viewModeObserver() {
       this._prefsChanged(this.prefs);
     },