diff --git a/src/Tag.cc b/src/Tag.cc
index 178edaa71e..d125e4917b 100644
--- a/src/Tag.cc
+++ b/src/Tag.cc
@@ -55,6 +55,7 @@ Tag& Tag::operator=(const Tag& other)
 		{
 		type = other.type;
 		subtype = other.subtype;
+		Unref(val);
 		val = other.val;
 
 		if ( val )