diff --git a/polygerrit-ui/app/embed/diff/gr-diff/gr-diff-utils.ts b/polygerrit-ui/app/embed/diff/gr-diff/gr-diff-utils.ts
index c41dc91..7e30581 100644
--- a/polygerrit-ui/app/embed/diff/gr-diff/gr-diff-utils.ts
+++ b/polygerrit-ui/app/embed/diff/gr-diff/gr-diff-utils.ts
@@ -226,7 +226,7 @@
     return FULL_CONTEXT;
   }
   if (
-    prefsContext &&
+    prefsContext !== undefined &&
     !(showFullContext === FullContext.NO && prefsContext === FULL_CONTEXT)
   ) {
     return prefsContext;