diff --git a/Source/ASDisplayNode.mm b/Source/ASDisplayNode.mm
index fe9dfb69..fb42f5be 100644
--- a/Source/ASDisplayNode.mm
+++ b/Source/ASDisplayNode.mm
@@ -2108,6 +2108,12 @@ ASDISPLAYNODE_INLINE BOOL subtreeIsRasterized(ASDisplayNode *node) {
 // NOTE: This method must be dealloc-safe (should not retain self).
 - (ASDisplayNode *)supernode
 {
+#if CHECK_LOCKING_SAFETY
+  if (__instanceLock__.locked()) {
+    NSLog(@"WARNING: Accessing supernode while holding recursive instance lock of this node is worrisome. It's likely that you will soon try to acquire the supernode's lock, and this can easily cause deadlocks.");
+  }
+#endif
+  
   ASDN::MutexLocker l(__instanceLock__);
   return _supernode;
 }