diff --git a/eth/tracers/native/4byte.go b/eth/tracers/native/4byte.go
index 6f3e80bd93..cec45a1e7a 100644
--- a/eth/tracers/native/4byte.go
+++ b/eth/tracers/native/4byte.go
@@ -58,7 +58,7 @@ type fourByteTracer struct {
 
 // newFourByteTracer returns a native go tracer which collects
 // 4 byte-identifiers of a tx, and implements vm.EVMLogger.
-func newFourByteTracer(ctx *tracers.Context, _ json.RawMessage, chainConfig *params.ChainConfig) (*tracers.Tracer, error) {
+func newFourByteTracer(ctx *tracers.Context, cfg json.RawMessage, chainConfig *params.ChainConfig) (*tracers.Tracer, error) {
 	t := &fourByteTracer{
 		ids:         make(map[string]int),
 		chainConfig: chainConfig,
diff --git a/eth/tracers/native/call.go b/eth/tracers/native/call.go
index b9003c5eb7..d3a353ac80 100644
--- a/eth/tracers/native/call.go
+++ b/eth/tracers/native/call.go
@@ -126,7 +126,7 @@ type callTracerConfig struct {
 
 // newCallTracer returns a native go tracer which tracks
 // call frames of a tx, and implements vm.EVMLogger.
-func newCallTracer(ctx *tracers.Context, cfg json.RawMessage, _ *params.ChainConfig) (*tracers.Tracer, error) {
+func newCallTracer(ctx *tracers.Context, cfg json.RawMessage, chainConfig *params.ChainConfig) (*tracers.Tracer, error) {
 	t, err := newCallTracerObject(ctx, cfg)
 	if err != nil {
 		return nil, err
diff --git a/eth/tracers/native/noop.go b/eth/tracers/native/noop.go
index dba2853b92..ac174cc25e 100644
--- a/eth/tracers/native/noop.go
+++ b/eth/tracers/native/noop.go
@@ -36,7 +36,7 @@ func init() {
 type noopTracer struct{}
 
 // newNoopTracer returns a new noop tracer.
-func newNoopTracer(ctx *tracers.Context, _ json.RawMessage, _ *params.ChainConfig) (*tracers.Tracer, error) {
+func newNoopTracer(ctx *tracers.Context, cfg json.RawMessage, chainConfig *params.ChainConfig) (*tracers.Tracer, error) {
 	t := &noopTracer{}
 	return &tracers.Tracer{
 		Hooks: &tracing.Hooks{
diff --git a/eth/tracers/native/prestate.go b/eth/tracers/native/prestate.go
index ed35c6fee3..03aaecbfeb 100644
--- a/eth/tracers/native/prestate.go
+++ b/eth/tracers/native/prestate.go
@@ -75,7 +75,7 @@ type prestateTracerConfig struct {
 	DiffMode bool `json:"diffMode"` // If true, this tracer will return state modifications
 }
 
-func newPrestateTracer(ctx *tracers.Context, cfg json.RawMessage, _ *params.ChainConfig) (*tracers.Tracer, error) {
+func newPrestateTracer(ctx *tracers.Context, cfg json.RawMessage, chainConfig *params.ChainConfig) (*tracers.Tracer, error) {
 	var config prestateTracerConfig
 	if cfg != nil {
 		if err := json.Unmarshal(cfg, &config); err != nil {