diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 74c87b921..d38586cd4 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -3009,21 +3009,6 @@ bool Blockchain::check_tx_outputs(const transaction& tx, tx_verification_context
     }
   }
 
-  // from v4, forbid invalid pubkeys
-  if (hf_version >= 4) {
-    for (const auto &o: tx.vout) {
-      crypto::public_key output_public_key;
-      if (!get_output_public_key(o, output_public_key)) {
-        tvc.m_invalid_output = true;
-        return false;
-      }
-      if (!crypto::check_key(output_public_key)) {
-        tvc.m_invalid_output = true;
-        return false;
-      }
-    }
-  }
-
   // from v8, allow bulletproofs
   if (hf_version < 8) {
     if (tx.version >= 2) {
diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp
index ee7e643a6..2df72a419 100644
--- a/src/cryptonote_core/cryptonote_core.cpp
+++ b/src/cryptonote_core/cryptonote_core.cpp
@@ -1041,6 +1041,8 @@ namespace cryptonote
     for(const auto& in: tx.vin)
     {
       CHECKED_GET_SPECIFIC_VARIANT(in, const txin_to_key, tokey_in, false);
+      if (rct::ki2rct(tokey_in.k_image) == rct::identity())
+        return false;
       if (!(rct::scalarmultKey(rct::ki2rct(tokey_in.k_image), rct::curveOrder()) == rct::identity()))
         return false;
     }