diff --git a/internal/mempool/v0/clist_mempool.go b/internal/mempool/v0/clist_mempool.go
index 40e93cc13..167fe0410 100644
--- a/internal/mempool/v0/clist_mempool.go
+++ b/internal/mempool/v0/clist_mempool.go
@@ -14,7 +14,6 @@ import (
 	"github.com/tendermint/tendermint/internal/mempool"
 	"github.com/tendermint/tendermint/libs/log"
 	tmmath "github.com/tendermint/tendermint/libs/math"
-	pubmempool "github.com/tendermint/tendermint/pkg/mempool"
 	"github.com/tendermint/tendermint/proxy"
 	"github.com/tendermint/tendermint/types"
 )
@@ -217,7 +216,7 @@ func (mem *CListMempool) CheckTx(
 	}
 
 	if txSize > mem.config.MaxTxBytes {
-		return pubmempool.ErrTxTooLarge{
+		return types.ErrTxTooLarge{
 			Max:    mem.config.MaxTxBytes,
 			Actual: txSize,
 		}
@@ -225,7 +224,7 @@ func (mem *CListMempool) CheckTx(
 
 	if mem.preCheck != nil {
 		if err := mem.preCheck(tx); err != nil {
-			return pubmempool.ErrPreCheck{
+			return types.ErrPreCheck{
 				Reason: err,
 			}
 		}
@@ -248,7 +247,7 @@ func (mem *CListMempool) CheckTx(
 			// its non-trivial since invalid txs can become valid,
 			// but they can spam the same tx with little cost to them atm.
 			if loaded {
-				return pubmempool.ErrTxInCache
+				return types.ErrTxInCache
 			}
 		}
 
@@ -364,7 +363,7 @@ func (mem *CListMempool) isFull(txSize int) error {
 	)
 
 	if memSize >= mem.config.Size || int64(txSize)+txsBytes > mem.config.MaxTxsBytes {
-		return pubmempool.ErrMempoolIsFull{
+		return types.ErrMempoolIsFull{
 			NumTxs:      memSize,
 			MaxTxs:      mem.config.Size,
 			TxsBytes:    txsBytes,
diff --git a/internal/mempool/v0/clist_mempool_test.go b/internal/mempool/v0/clist_mempool_test.go
index 65a1b123e..6f3e6ebc0 100644
--- a/internal/mempool/v0/clist_mempool_test.go
+++ b/internal/mempool/v0/clist_mempool_test.go
@@ -23,7 +23,6 @@ import (
 	"github.com/tendermint/tendermint/libs/log"
 	tmrand "github.com/tendermint/tendermint/libs/rand"
 	"github.com/tendermint/tendermint/libs/service"
-	pubmempool "github.com/tendermint/tendermint/pkg/mempool"
 	"github.com/tendermint/tendermint/proxy"
 	"github.com/tendermint/tendermint/types"
 )
@@ -82,7 +81,7 @@ func checkTxs(t *testing.T, mp mempool.Mempool, count int, peerID uint16) types.
 			// Skip invalid txs.
 			// TestMempoolFilters will fail otherwise. It asserts a number of txs
 			// returned.
-			if pubmempool.IsPreCheckError(err) {
+			if types.IsPreCheckError(err) {
 				continue
 			}
 			t.Fatalf("CheckTx failed: %v while checking #%d tx", err, i)
@@ -455,7 +454,7 @@ func TestMempool_CheckTxChecksTxSize(t *testing.T) {
 		if !testCase.err {
 			require.NoError(t, err, caseString)
 		} else {
-			require.Equal(t, err, pubmempool.ErrTxTooLarge{
+			require.Equal(t, err, types.ErrTxTooLarge{
 				Max:    maxTxSize,
 				Actual: testCase.len,
 			}, caseString)
@@ -503,7 +502,7 @@ func TestMempoolTxsBytes(t *testing.T) {
 
 	err = mp.CheckTx(context.Background(), []byte{0x05}, nil, mempool.TxInfo{})
 	if assert.Error(t, err) {
-		assert.IsType(t, pubmempool.ErrMempoolIsFull{}, err)
+		assert.IsType(t, types.ErrMempoolIsFull{}, err)
 	}
 
 	// 6. zero after tx is rechecked and removed due to not being valid anymore
diff --git a/internal/mempool/v1/mempool.go b/internal/mempool/v1/mempool.go
index 850600697..46e7f5fcc 100644
--- a/internal/mempool/v1/mempool.go
+++ b/internal/mempool/v1/mempool.go
@@ -14,7 +14,6 @@ import (
 	"github.com/tendermint/tendermint/internal/mempool"
 	"github.com/tendermint/tendermint/libs/log"
 	tmmath "github.com/tendermint/tendermint/libs/math"
-	pubmempool "github.com/tendermint/tendermint/pkg/mempool"
 	"github.com/tendermint/tendermint/proxy"
 	"github.com/tendermint/tendermint/types"
 )
@@ -239,7 +238,7 @@ func (txmp *TxMempool) CheckTx(
 
 	txSize := len(tx)
 	if txSize > txmp.config.MaxTxBytes {
-		return pubmempool.ErrTxTooLarge{
+		return types.ErrTxTooLarge{
 			Max:    txmp.config.MaxTxBytes,
 			Actual: txSize,
 		}
@@ -247,7 +246,7 @@ func (txmp *TxMempool) CheckTx(
 
 	if txmp.preCheck != nil {
 		if err := txmp.preCheck(tx); err != nil {
-			return pubmempool.ErrPreCheck{
+			return types.ErrPreCheck{
 				Reason: err,
 			}
 		}
@@ -267,7 +266,7 @@ func (txmp *TxMempool) CheckTx(
 		if wtx != nil && ok {
 			// We already have the transaction stored and the we've already seen this
 			// transaction from txInfo.SenderID.
-			return pubmempool.ErrTxInCache
+			return types.ErrTxInCache
 		}
 
 		txmp.logger.Debug("tx exists already in cache", "tx_hash", tx.Hash())
@@ -728,7 +727,7 @@ func (txmp *TxMempool) canAddTx(wtx *WrappedTx) error {
 	)
 
 	if numTxs >= txmp.config.Size || int64(wtx.Size())+sizeBytes > txmp.config.MaxTxsBytes {
-		return pubmempool.ErrMempoolIsFull{
+		return types.ErrMempoolIsFull{
 			NumTxs:      numTxs,
 			MaxTxs:      txmp.config.Size,
 			TxsBytes:    sizeBytes,
diff --git a/pkg/mempool/errors.go b/types/mempool.go
similarity index 98%
rename from pkg/mempool/errors.go
rename to types/mempool.go
index e3a9a2217..c739796af 100644
--- a/pkg/mempool/errors.go
+++ b/types/mempool.go
@@ -1,4 +1,4 @@
-package mempool
+package types
 
 import (
 	"errors"