diff --git a/go/ast/astutil/imports.go b/go/ast/astutil/imports.go
index 3e4b195368..2087ceec9c 100644
--- a/go/ast/astutil/imports.go
+++ b/go/ast/astutil/imports.go
@@ -275,9 +275,10 @@ func DeleteNamedImport(fset *token.FileSet, f *ast.File, name, path string) (del
 
 				// We deleted an entry but now there may be
 				// a blank line-sized hole where the import was.
-				if line-lastLine > 1 {
+				if line-lastLine > 1 || !gen.Rparen.IsValid() {
 					// There was a blank line immediately preceding the deleted import,
-					// so there's no need to close the hole.
+					// so there's no need to close the hole. The right parenthesis is
+					// invalid after AddImport to an import statement without parenthesis.
 					// Do nothing.
 				} else if line != fset.File(gen.Rparen).LineCount() {
 					// There was no blank line. Close the hole.
diff --git a/go/ast/astutil/imports_test.go b/go/ast/astutil/imports_test.go
index 1d86e4773e..68f05ab6d9 100644
--- a/go/ast/astutil/imports_test.go
+++ b/go/ast/astutil/imports_test.go
@@ -1684,6 +1684,19 @@ func TestDeleteImport(t *testing.T) {
 	}
 }
 
+func TestDeleteImportAfterAddImport(t *testing.T) {
+	file := parse(t, "test", `package main
+
+import "os"
+`)
+	if got, want := AddImport(fset, file, "fmt"), true; got != want {
+		t.Errorf("AddImport: got: %v, want: %v", got, want)
+	}
+	if got, want := DeleteImport(fset, file, "fmt"), true; got != want {
+		t.Errorf("DeleteImport: got: %v, want: %v", got, want)
+	}
+}
+
 type rewriteTest struct {
 	name   string
 	srcPkg string