diff --git a/src/cc/assets.cpp b/src/cc/assets.cpp
index 2433473b9..6aae09dd3 100644
--- a/src/cc/assets.cpp
+++ b/src/cc/assets.cpp
@@ -146,6 +146,13 @@ bool AssetsValidate(struct CCcontract_info *cpAssets,Eval* eval,const CTransacti
     outputs = inputs = 0;
     preventCCvins = preventCCvouts = -1;
 
+    // add specific chains exceptions for old token support:
+    if (strcmp(ASSETCHAINS_SYMBOL, "SEC") == 0 && chainActive.Height() <= 144073)
+        return true;
+
+    if (strcmp(ASSETCHAINS_SYMBOL, "MGNX") == 0 && chainActive.Height() <= 210190)
+        return true;
+
 	if (numvouts == 0)
 		return eval->Invalid("AssetValidate: no vouts");