diff --git a/node/CertificateOfOwnership.hpp b/node/CertificateOfOwnership.hpp
index ffb0f74ba..bae7ef2f2 100644
--- a/node/CertificateOfOwnership.hpp
+++ b/node/CertificateOfOwnership.hpp
@@ -76,6 +76,7 @@ public:
 	{
 		memset(_thingTypes,0,sizeof(_thingTypes));
 		memset(_thingValues,0,sizeof(_thingValues));
+		memset(_signature.data,0,sizeof(_signature.data));
 	}
 
 	CertificateOfOwnership(const uint64_t nwid,const int64_t ts,const Address &issuedTo,const uint32_t id) :
@@ -88,6 +89,7 @@ public:
 	{
 		memset(_thingTypes,0,sizeof(_thingTypes));
 		memset(_thingValues,0,sizeof(_thingValues));
+		memset(_signature.data,0,sizeof(_signature.data));
 	}
 
 	inline uint64_t networkId() const { return _networkId; }
diff --git a/node/Tag.hpp b/node/Tag.hpp
index 9d6ecc3bd..ec53f734e 100644
--- a/node/Tag.hpp
+++ b/node/Tag.hpp
@@ -71,6 +71,7 @@ public:
 		_networkId(0),
 		_ts(0)
 	{
+		memset(_signature.data,0,sizeof(_signature.data));
 	}
 
 	/**