diff --git a/src/base58.h b/src/base58.h
index d535491bb..90014b949 100644
--- a/src/base58.h
+++ b/src/base58.h
@@ -146,7 +146,10 @@ public:
 
     K GetKey() {
         K ret;
-        ret.Decode(&vchData[0]);
+        if (vchData.size() == Size) {
+            //if base58 encouded data not holds a ext key, return a !IsValid() key
+            ret.Decode(&vchData[0]);
+        }
         return ret;
     }