diff --git a/src/trace_processor/metrics/sql/android/jank/relevant_slices.sql b/src/trace_processor/metrics/sql/android/jank/relevant_slices.sql
index 9c4331891a..536dea7505 100644
--- a/src/trace_processor/metrics/sql/android/jank/relevant_slices.sql
+++ b/src/trace_processor/metrics/sql/android/jank/relevant_slices.sql
@@ -67,6 +67,7 @@ WHERE
 -- Ignore child slice e.g. "Choreographer#doFrame - resynced to 1234 in 20.0ms"
   AND slice.name not GLOB '*resynced*'
   AND slice.dur > 0
+  AND vsync > 0
   AND (vsync >= begin_vsync OR begin_vsync is NULL)
   AND (vsync <= end_vsync OR end_vsync is NULL)
   -- In some malformed traces we see nested doFrame slices.