diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index d2d43490e..a0031559b 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -744,25 +744,6 @@ bool Blockchain::get_block_by_hash(const crypto::hash &h, block &blk, bool *orph
   return false;
 }
 //------------------------------------------------------------------
-//FIXME: this function does not seem to be called from anywhere, but
-// if it ever is, should probably change std::list for std::vector
-void Blockchain::get_all_known_block_ids(std::list<crypto::hash> &main, std::list<crypto::hash> &alt, std::list<crypto::hash> &invalid) const
-{
-  LOG_PRINT_L3("Blockchain::" << __func__);
-  CRITICAL_REGION_LOCAL(m_blockchain_lock);
-
-  for (auto& a : m_db->get_hashes_range(0, m_db->height() - 1))
-  {
-    main.push_back(a);
-  }
-
-  for (const blocks_ext_by_hash::value_type &v: m_alternative_chains)
-    alt.push_back(v.first);
-
-  for (const blocks_ext_by_hash::value_type &v: m_invalid_blocks)
-    invalid.push_back(v.first);
-}
-//------------------------------------------------------------------
 // This function aggregates the cumulative difficulties and timestamps of the
 // last DIFFICULTY_BLOCKS_COUNT blocks and passes them to next_difficulty,
 // returning the result of that call.  Ignores the genesis block, and can use
diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h
index dd490cdd5..1a52e20bf 100644
--- a/src/cryptonote_core/blockchain.h
+++ b/src/cryptonote_core/blockchain.h
@@ -206,15 +206,6 @@ namespace cryptonote
      */
     bool get_block_by_hash(const crypto::hash &h, block &blk, bool *orphan = NULL) const;
 
-    /**
-     * @brief get all block hashes (main chain, alt chains, and invalid blocks)
-     *
-     * @param main return-by-reference container to put result main chain blocks' hashes in
-     * @param alt return-by-reference container to put result alt chain blocks' hashes in
-     * @param invalid return-by-reference container to put result invalid blocks' hashes in
-     */
-    void get_all_known_block_ids(std::list<crypto::hash> &main, std::list<crypto::hash> &alt, std::list<crypto::hash> &invalid) const;
-
     /**
      * @brief performs some preprocessing on a group of incoming blocks to speed up verification
      *