diff --git a/src/MQTTProperties.c b/src/MQTTProperties.c
index f1d29fb7..0a8cb5ee 100644
--- a/src/MQTTProperties.c
+++ b/src/MQTTProperties.c
@@ -245,6 +245,7 @@ int MQTTProperty_read(MQTTProperty* prop, char** pptr, char* enddata)
   int type = -1,
     len = -1;
 
+  memset(prop, 0, sizeof(MQTTProperty));
   prop->identifier = readChar(pptr);
   type = MQTTProperty_getType(prop->identifier);
   if (type >= MQTTPROPERTY_TYPE_BYTE && type <= MQTTPROPERTY_TYPE_UTF_8_STRING_PAIR)