diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 65bfce2..b128fb7 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -1183,7 +1183,8 @@
     perfetto::protos::LayersProto dumpDrawingStateProto(uint32_t traceFlags) const
             REQUIRES(kMainThreadContext);
     void dumpOffscreenLayersProto(perfetto::protos::LayersProto& layersProto,
-                                  uint32_t traceFlags = LayerTracing::TRACE_ALL) const;
+                                  uint32_t traceFlags = LayerTracing::TRACE_ALL) const
+            REQUIRES(kMainThreadContext);
     google::protobuf::RepeatedPtrField<perfetto::protos::DisplayProto> dumpDisplayProto() const;
     void doActiveLayersTracingIfNeeded(bool isCompositionComputed, bool visibleRegionDirty,
                                        TimePoint, VsyncId) REQUIRES(kMainThreadContext);