diff --git a/src/cpp/ripple/ripple_SHAMapTreeNode.cpp b/src/cpp/ripple/ripple_SHAMapTreeNode.cpp
index bd41e12d6c..e4bc49f0dd 100644
--- a/src/cpp/ripple/ripple_SHAMapTreeNode.cpp
+++ b/src/cpp/ripple/ripple_SHAMapTreeNode.cpp
@@ -191,6 +191,8 @@ bool SHAMapTreeNode::updateHash()
 			assert(nh == s.getSHA512Half());
 #endif
 		}
+		else
+			nh.zero();
 	}
 	else if (mType == tnTRANSACTION_NM)
 	{