diff --git a/src/RegToken.c b/src/RegToken.c
index d842bab..fa041d3 100644
--- a/src/RegToken.c
+++ b/src/RegToken.c
@@ -154,13 +154,17 @@ RegTokenFree(RegTokenInfo *tokeninfo)
 int
 RegTokenClose(RegTokenInfo * tokeninfo)
 {
+    HashMap *json;
+
     if (!tokeninfo)
     {
         return 0;
     }
 
     /* Write object to database. */
-    DbJsonSet(tokeninfo->ref, RegTokenInfoToJson(tokeninfo));
+    json = RegTokenInfoToJson(tokeninfo);
+    DbJsonSet(tokeninfo->ref, json); /* Copies json into internal structure. */
+    JsonFree(json);
 
     return DbUnlock(tokeninfo->db, tokeninfo->ref);
 }