diff --git a/tools/build_langserver/lsp/completion.go b/tools/build_langserver/lsp/completion.go
index 83bd156374..546ac536b2 100644
--- a/tools/build_langserver/lsp/completion.go
+++ b/tools/build_langserver/lsp/completion.go
@@ -40,7 +40,7 @@ func (h *Handler) completeLabel(doc *doc, partial string, line, col int) (*lsp.C
 					if !strings.HasPrefix(s, partial) {
 						s = t.Label.String() // Don't abbreviate it if we end up losing part of what's there
 					}
-					list.Items = append(list.Items, completionItem(s, partial, line, col))
+					list.Items = append(list.Items, completionItem(s, line, col))
 					m[s] = true
 				}
 			}
@@ -51,7 +51,7 @@ func (h *Handler) completeLabel(doc *doc, partial string, line, col int) (*lsp.C
 			for _, target := range h.allTargets(doc) {
 				if (label.Name == "all" && !strings.HasPrefix(label.Name, "_")) || strings.HasPrefix(target, label.Name) {
 					if s := ":" + target; !m[s] {
-						list.Items = append(list.Items, completionItem(s, partial, line, col))
+						list.Items = append(list.Items, completionItem(s, line, col))
 					}
 				}
 			}
@@ -101,7 +101,7 @@ func (h *Handler) completeString(doc *doc, s string, line, col int) (*lsp.Comple
 		Items: make([]lsp.CompletionItem, len(matches)),
 	}
 	for i, match := range matches {
-		list.Items[i] = completionItem(match, s, line, col)
+		list.Items[i] = completionItem(match, line, col)
 	}
 	return list, nil
 }
@@ -111,7 +111,7 @@ func (h *Handler) completeIdent(doc *doc, s string, line, col int) (*lsp.Complet
 	list := &lsp.CompletionList{}
 	for name, f := range h.builtins {
 		if strings.HasPrefix(name, s) {
-			item := completionItem(name, s, line, col)
+			item := completionItem(name, line, col)
 			item.Documentation = f.Stmt.FuncDef.Docstring
 			item.Kind = lsp.CIKFunction
 			list.Items = append(list.Items, item)
@@ -141,13 +141,13 @@ func stringLiteral(s string) string {
 	return s[1 : len(s)-1]
 }
 
-func completionItem(label, prefix string, line, col int) lsp.CompletionItem {
+func completionItem(label string, line, col int) lsp.CompletionItem {
 	return lsp.CompletionItem{
 		Label:            label,
 		Kind:             lsp.CIKValue,
 		InsertTextFormat: lsp.ITFPlainText,
 		TextEdit: &lsp.TextEdit{
-			NewText: strings.TrimPrefix(label, prefix),
+			NewText: label,
 			Range: lsp.Range{
 				Start: lsp.Position{Line: line, Character: col},
 				End:   lsp.Position{Line: line, Character: col},
@@ -204,7 +204,7 @@ func (h *Handler) completePackages(pkg *pkg, allParts, parts []string, line, col
 		// Last part, take anything in here with the relevant prefix
 		for name := range pkg.Subpackages {
 			if strings.HasPrefix(name, part) {
-				items = append(items, completionItem(prefix+name, prefix+part, line, col))
+				items = append(items, completionItem(prefix+name, line, col))
 			}
 		}
 	} else if pkg.Subpackages != nil {