diff --git a/consensus/ethash/consensus.go b/consensus/ethash/consensus.go
index 7dec436a26..6a93fead29 100644
--- a/consensus/ethash/consensus.go
+++ b/consensus/ethash/consensus.go
@@ -507,8 +507,8 @@ func calcDifficultyFrontier(time uint64, parent *types.Header) *big.Int {
 }
 
 // Exported for fuzzing
-var FrontierDifficultyCalulator = calcDifficultyFrontier
-var HomesteadDifficultyCalulator = calcDifficultyHomestead
+var FrontierDifficultyCalculator = calcDifficultyFrontier
+var HomesteadDifficultyCalculator = calcDifficultyHomestead
 var DynamicDifficultyCalculator = makeDifficultyCalculator
 
 // verifySeal checks whether a block satisfies the PoW difficulty requirements,
diff --git a/consensus/ethash/consensus_test.go b/consensus/ethash/consensus_test.go
index 6f6dc79fd8..bca424af30 100644
--- a/consensus/ethash/consensus_test.go
+++ b/consensus/ethash/consensus_test.go
@@ -121,8 +121,8 @@ func TestDifficultyCalculators(t *testing.T) {
 			bigFn  func(time uint64, parent *types.Header) *big.Int
 			u256Fn func(time uint64, parent *types.Header) *big.Int
 		}{
-			{FrontierDifficultyCalulator, CalcDifficultyFrontierU256},
-			{HomesteadDifficultyCalulator, CalcDifficultyHomesteadU256},
+			{FrontierDifficultyCalculator, CalcDifficultyFrontierU256},
+			{HomesteadDifficultyCalculator, CalcDifficultyHomesteadU256},
 			{DynamicDifficultyCalculator(bombDelay), MakeDifficultyCalculatorU256(bombDelay)},
 		} {
 			time := header.Time + timeDelta
diff --git a/tests/fuzzers/difficulty/difficulty-fuzz.go b/tests/fuzzers/difficulty/difficulty-fuzz.go
index e4c5dcf57c..58936fcd80 100644
--- a/tests/fuzzers/difficulty/difficulty-fuzz.go
+++ b/tests/fuzzers/difficulty/difficulty-fuzz.go
@@ -130,8 +130,8 @@ func (f *fuzzer) fuzz() int {
 		bigFn  calculator
 		u256Fn calculator
 	}{
-		{ethash.FrontierDifficultyCalulator, ethash.CalcDifficultyFrontierU256},
-		{ethash.HomesteadDifficultyCalulator, ethash.CalcDifficultyHomesteadU256},
+		{ethash.FrontierDifficultyCalculator, ethash.CalcDifficultyFrontierU256},
+		{ethash.HomesteadDifficultyCalculator, ethash.CalcDifficultyHomesteadU256},
 		{ethash.DynamicDifficultyCalculator(bombDelay), ethash.MakeDifficultyCalculatorU256(bombDelay)},
 	} {
 		want := pair.bigFn(time, header)