diff --git a/accounts/abi/abi_test.go b/accounts/abi/abi_test.go
index a45bd6cc0f..f41a2b510c 100644
--- a/accounts/abi/abi_test.go
+++ b/accounts/abi/abi_test.go
@@ -112,6 +112,13 @@ func TestSimpleMethodUnpack(t *testing.T) {
 		outVar           string      // the output variable (e.g. uint32, *big.Int, etc)
 		err              string      // empty or error if expected
 	}{
+		{
+			`[ { "type": "bool" } ]`,
+			pad([]byte{1}, 32, true),
+			bool(true),
+			"bool",
+			"",
+		},
 		{
 			`[ { "type": "uint32" } ]`,
 			pad([]byte{1}, 32, true),
@@ -215,6 +222,10 @@ func TestSimpleMethodUnpack(t *testing.T) {
 
 		var outvar interface{}
 		switch test.outVar {
+		case "bool":
+			var v bool
+			err = abi.Unpack(&v, "method", test.marshalledOutput)
+			outvar = v
 		case "uint8":
 			var v uint8
 			err = abi.Unpack(&v, "method", test.marshalledOutput)
diff --git a/accounts/abi/unpack.go b/accounts/abi/unpack.go
index b6c41de682..a220705e19 100644
--- a/accounts/abi/unpack.go
+++ b/accounts/abi/unpack.go
@@ -118,7 +118,7 @@ func toGoSlice(i int, t Argument, output []byte) (interface{}, error) {
 		case IntTy, UintTy:
 			inter = readInteger(t.Type.Kind, returnOutput)
 		case BoolTy:
-			inter, err = getBoolValue(returnOutput)
+			inter, err = readBool(returnOutput)
 			if err != nil {
 				return nil, err
 			}
@@ -160,7 +160,10 @@ func readInteger(kind reflect.Kind, b []byte) interface{} {
 	}
 }
 
-func getBoolValue(word []byte) (bool, error) {
+func readBool(word []byte) (bool, error) {
+	if len(word) != 32 {
+		panic("abi: fatal error. Incorrect word length.")
+	}
 	improperEncoding := "abi: improperly encoded boolean value"
 	for i, b := range word {
 		if b != 0 && i != 31 {
@@ -218,7 +221,7 @@ func toGoType(i int, t Argument, output []byte) (interface{}, error) {
 	case IntTy, UintTy:
 		return readInteger(t.Type.Kind, returnOutput), nil
 	case BoolTy:
-		return getBoolValue(returnOutput)
+		return readBool(returnOutput)
 	case AddressTy:
 		return common.BytesToAddress(returnOutput), nil
 	case HashTy: