diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 7dc2cab..33f435e 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2537,6 +2537,8 @@
 }
 
 status_t SurfaceFlinger::removeLayer(const sp<Layer>& layer) {
+    Mutex::Autolock _l(mStateLock);
+
     const auto& p = layer->getParent();
     const ssize_t index = (p != nullptr) ? p->removeChild(layer) :
         mCurrentState.layersSortedByZ.remove(layer);