diff --git a/cmd/algofix/typecheck.go b/cmd/algofix/typecheck.go
index 2b55355a26..e17cbf5963 100644
--- a/cmd/algofix/typecheck.go
+++ b/cmd/algofix/typecheck.go
@@ -9,6 +9,7 @@ import (
 	"go/ast"
 	"go/parser"
 	"go/token"
+	"maps"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -258,10 +259,7 @@ func typecheck(cfg *TypeConfig, f *ast.File) (typeof map[interface{}]string, ass
 					if !copied {
 						copied = true
 						// Copy map lazily: it's time.
-						cfg1.Type = make(map[string]*Type)
-						for k, v := range cfg.Type {
-							cfg1.Type[k] = v
-						}
+						cfg1.Type = maps.Clone(cfg.Type)
 					}
 					t := &Type{Field: map[string]string{}}
 					cfg1.Type[s.Name.Name] = t