diff --git a/internal/lsp/source/completion.go b/internal/lsp/source/completion.go
index af7131f..2230f60 100644
--- a/internal/lsp/source/completion.go
+++ b/internal/lsp/source/completion.go
@@ -1,6 +1,7 @@
 package source
 
 import (
+	"bytes"
 	"context"
 	"fmt"
 	"go/ast"
@@ -105,7 +106,6 @@
 	if items, ok := complit(path, pos, pkg, info, found); ok {
 		return items, "", nil
 	}
-
 	switch n := path[0].(type) {
 	case *ast.Ident:
 		// Set the filter prefix.
@@ -440,7 +440,7 @@
 
 // formatParams correctly format the parameters of a function.
 func formatParams(t *types.Tuple, variadic bool, qualifier types.Qualifier) string {
-	var b strings.Builder
+	var b bytes.Buffer
 	b.WriteByte('(')
 	for i := 0; i < t.Len(); i++ {
 		if i > 0 {