diff --git a/accounts/abi/argument.go b/accounts/abi/argument.go
index c7009a6165..227a088b7d 100644
--- a/accounts/abi/argument.go
+++ b/accounts/abi/argument.go
@@ -234,7 +234,7 @@ func (arguments Arguments) Pack(args ...interface{}) ([]byte, error) {
 	for _, abiArg := range abiArgs {
 		inputOffset += getTypeSize(abiArg.Type)
 	}
-	var ret = make([]byte, 0, len(args))
+	var ret []byte
 	for i, a := range args {
 		input := abiArgs[i]
 		// pack the input
diff --git a/common/compiler/solidity.go b/common/compiler/solidity.go
index f46ba4888d..9de94017c2 100644
--- a/common/compiler/solidity.go
+++ b/common/compiler/solidity.go
@@ -63,7 +63,7 @@ func ParseCombinedJSON(combinedJSON []byte, source string, languageVersion strin
 		return parseCombinedJSONV8(combinedJSON, source, languageVersion, compilerVersion, compilerOptions)
 	}
 	// Compilation succeeded, assemble and return the contracts.
-	contracts := make(map[string]*Contract, len(output.Contracts))
+	contracts := make(map[string]*Contract)
 	for name, info := range output.Contracts {
 		// Parse the individual compilation results.
 		var abi, userdoc, devdoc interface{}
@@ -107,7 +107,7 @@ func parseCombinedJSONV8(combinedJSON []byte, source string, languageVersion str
 		return nil, err
 	}
 	// Compilation succeeded, assemble and return the contracts.
-	contracts := make(map[string]*Contract, len(output.Contracts))
+	contracts := make(map[string]*Contract)
 	for name, info := range output.Contracts {
 		contracts[name] = &Contract{
 			Code:        "0x" + info.Bin,