diff --git a/src/cpp/ripple/SHAMapNodes.cpp b/src/cpp/ripple/SHAMapNodes.cpp
index 2efd7ea3cf..716fdeb52c 100644
--- a/src/cpp/ripple/SHAMapNodes.cpp
+++ b/src/cpp/ripple/SHAMapNodes.cpp
@@ -343,6 +343,8 @@ bool SHAMapTreeNode::updateHash()
 			assert(nh == s.getSHA512Half());
 #endif
 		}
+		else
+			nh.zero();
 	}
 	else if (mType == tnTRANSACTION_NM)
 	{