diff --git a/src/validation.cpp b/src/validation.cpp
index 8780d5f371..9a6a751b17 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -4230,6 +4230,10 @@ bool ChainstateManager::ProcessNewBlock(const std::shared_ptr<const CBlock>& blo
         // malleability that cause CheckBlock() to fail; see e.g. CVE-2012-2459 and
         // https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-February/016697.html.  Because CheckBlock() is
         // not very expensive, the anti-DoS benefits of caching failure (of a definitely-invalid block) are not substantial.
+        // Blackcoin: also check for the signature encoding
+        if (!CheckCanonicalBlockSignature(block)) {
+            return error("%s: AcceptBlock FAILED (%s)", __func__, "bad block signature encoding");
+        }
         bool ret = CheckBlock(*block, state, GetConsensus(), ActiveChainstate());
         if (ret) {
             // Store to disk