diff --git a/operator-unset.go b/operator-unset.go
index b3a1520..3910464 100644
--- a/operator-unset.go
+++ b/operator-unset.go
@@ -23,7 +23,7 @@ func deleteContextItem(ctx ExprContext, opTerm *term, item any) (deleted bool, e
 		var size int
 		if strings.HasSuffix(name, "()") {
 			size = ctx.FuncCount()
-			ctx.DeleteVar(strings.TrimRight(name, "()"))
+			ctx.DeleteFunc(strings.TrimRight(name, "()"))
 			deleted = ctx.FuncCount() < size
 		} else {
 			size = ctx.VarCount()
diff --git a/t_operator_test.go b/t_operator_test.go
index 2346212..1ff894b 100644
--- a/t_operator_test.go
+++ b/t_operator_test.go
@@ -13,10 +13,11 @@ func TestOperator(t *testing.T) {
 	inputs := []inputType{
 		/*   1 */ {`a=1; unset "a"; a`, nil, `undefined variable or function "a"`},
 		/*   2 */ {`a=1; unset ["a", "b"]`, int64(1), nil},
+		/*   3 */ {`f=func(){3}; unset "f()"`, int64(1), nil},
 	}
 
 	// t.Setenv("EXPR_PATH", ".")
 
-	runTestSuiteSpec(t, section, inputs, 2)
-	//runTestSuite(t, section, inputs)
+	//runTestSuiteSpec(t, section, inputs, 3)
+	runTestSuite(t, section, inputs)
 }