diff --git a/eth/api_backend.go b/eth/api_backend.go
index a0a7068d0c..8e2af684d1 100644
--- a/eth/api_backend.go
+++ b/eth/api_backend.go
@@ -42,6 +42,12 @@ import (
 	"github.com/ethereum/go-ethereum/rpc"
 )
 
+// ErrorPrunedHistory is returned when the requested history is pruned.
+type ErrorPrunedHistory struct{}
+
+func (e *ErrorPrunedHistory) Error() string  { return "Pruned history unavailable" }
+func (e *ErrorPrunedHistory) ErrorCode() int { return 4444 }
+
 // EthAPIBackend implements ethapi.Backend and tracers.Backend for full nodes
 type EthAPIBackend struct {
 	extRPCEnabled       bool
@@ -154,7 +160,7 @@ func (b *EthAPIBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumbe
 		bn = b.eth.blockchain.HistoryPruningCutoff()
 	}
 	if bn < b.eth.blockchain.HistoryPruningCutoff() {
-		return nil, &prunedHistoryError{}
+		return nil, &ErrorPrunedHistory{}
 	}
 	return b.eth.blockchain.GetBlockByNumber(bn), nil
 }
@@ -165,7 +171,7 @@ func (b *EthAPIBackend) BlockByHash(ctx context.Context, hash common.Hash) (*typ
 		return nil, nil
 	}
 	if *number < b.eth.blockchain.HistoryPruningCutoff() {
-		return nil, &prunedHistoryError{}
+		return nil, &ErrorPrunedHistory{}
 	}
 	return b.eth.blockchain.GetBlock(hash, *number), nil
 }
@@ -194,7 +200,7 @@ func (b *EthAPIBackend) BlockByNumberOrHash(ctx context.Context, blockNrOrHash r
 			return nil, errors.New("hash is not currently canonical")
 		}
 		if header.Number.Uint64() < b.eth.blockchain.HistoryPruningCutoff() {
-			return nil, &prunedHistoryError{}
+			return nil, &ErrorPrunedHistory{}
 		}
 		block := b.eth.blockchain.GetBlock(hash, header.Number.Uint64())
 		if block == nil {
@@ -448,8 +454,3 @@ func (b *EthAPIBackend) StateAtBlock(ctx context.Context, block *types.Block, re
 func (b *EthAPIBackend) StateAtTransaction(ctx context.Context, block *types.Block, txIndex int, reexec uint64) (*types.Transaction, vm.BlockContext, *state.StateDB, tracers.StateReleaseFunc, error) {
 	return b.eth.stateAtTransaction(ctx, block, txIndex, reexec)
 }
-
-type prunedHistoryError struct{}
-
-func (e *prunedHistoryError) Error() string  { return "Pruned history unavailable" }
-func (e *prunedHistoryError) ErrorCode() int { return 4444 }
diff --git a/eth/filters/api.go b/eth/filters/api.go
index 5c2efaba32..c2f700ace8 100644
--- a/eth/filters/api.go
+++ b/eth/filters/api.go
@@ -29,6 +29,7 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/internal/ethapi"
 	"github.com/ethereum/go-ethereum/rpc"
 )
@@ -359,7 +360,7 @@ func (api *FilterAPI) GetLogs(ctx context.Context, crit FilterCriteria) ([]*type
 			return nil, errInvalidBlockRange
 		}
 		if begin > 0 && begin < int64(api.events.backend.HistoryPruningCutoff()) {
-			return nil, &prunedHistoryError{}
+			return nil, &eth.ErrorPrunedHistory{}
 		}
 		// Construct the range filter
 		filter = api.sys.NewRangeFilter(begin, end, crit.Addresses, crit.Topics)
diff --git a/eth/filters/filter.go b/eth/filters/filter.go
index e9bc6ac1a4..9cd885b127 100644
--- a/eth/filters/filter.go
+++ b/eth/filters/filter.go
@@ -27,6 +27,7 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/filtermaps"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/rpc"
 )
@@ -87,7 +88,7 @@ func (f *Filter) Logs(ctx context.Context) ([]*types.Log, error) {
 			return nil, errors.New("unknown block")
 		}
 		if header.Number.Uint64() < f.sys.backend.HistoryPruningCutoff() {
-			return nil, &prunedHistoryError{}
+			return nil, &eth.ErrorPrunedHistory{}
 		}
 		return f.blockLogs(ctx, header)
 	}
diff --git a/eth/filters/filter_system.go b/eth/filters/filter_system.go
index 42ffe69059..c8edec5351 100644
--- a/eth/filters/filter_system.go
+++ b/eth/filters/filter_system.go
@@ -31,6 +31,7 @@ import (
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/filtermaps"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/log"
@@ -140,11 +141,6 @@ func (sys *FilterSystem) cachedGetBody(ctx context.Context, elem *logCacheElem,
 	return body, nil
 }
 
-type prunedHistoryError struct{}
-
-func (e *prunedHistoryError) Error() string  { return "Pruned history unavailable" }
-func (e *prunedHistoryError) ErrorCode() int { return 4444 }
-
 // Type determines the kind of filter and is used to put the filter in to
 // the correct bucket when added.
 type Type byte
@@ -315,7 +311,7 @@ func (es *EventSystem) SubscribeLogs(crit ethereum.FilterQuery, logs chan []*typ
 	}
 	// Queries beyond the pruning cutoff are not supported.
 	if uint64(from) < es.backend.HistoryPruningCutoff() {
-		return nil, &prunedHistoryError{}
+		return nil, &eth.ErrorPrunedHistory{}
 	}
 
 	// only interested in new mined logs