diff --git a/flytectl/cmd/register/register_util.go b/flytectl/cmd/register/register_util.go
index 922ff211da..0f646c89b5 100644
--- a/flytectl/cmd/register/register_util.go
+++ b/flytectl/cmd/register/register_util.go
@@ -328,8 +328,8 @@ func validateLPWithSchedule(lpSpec *admin.LaunchPlanSpec, wf *admin.Workflow) er
 	var scheduleParamsWithValues []string
 	// Check for default values
 	if lpSpec.DefaultInputs != nil {
-		for paramName := range lpSpec.DefaultInputs.Parameters {
-			if paramName != schedule.KickoffTimeInputArg {
+		for paramName, paramValue := range lpSpec.DefaultInputs.Parameters {
+			if paramName != schedule.KickoffTimeInputArg && paramValue.GetDefault() != nil {
 				scheduleParamsWithValues = append(scheduleParamsWithValues, paramName)
 			}
 		}
diff --git a/flytectl/cmd/register/register_util_test.go b/flytectl/cmd/register/register_util_test.go
index 7be93359c0..6e31565cec 100644
--- a/flytectl/cmd/register/register_util_test.go
+++ b/flytectl/cmd/register/register_util_test.go
@@ -755,7 +755,7 @@ func TestValidateLaunchSpec(t *testing.T) {
 		assert.NotNil(t, err)
 		assert.Contains(t, err.Error(), "param values are missing on scheduled workflow for the following params")
 	})
-	t.Run("launchplan spec non empty schedule required param success", func(t *testing.T) {
+	t.Run("launchplan spec non empty schedule default param success", func(t *testing.T) {
 		s := setup()
 		registerFilesSetup()
 		variableMap := map[string]*core.Variable{
@@ -820,6 +820,21 @@ func TestValidateLaunchSpec(t *testing.T) {
 								Type: &core.LiteralType_Simple{Simple: core.SimpleType_INTEGER},
 							},
 						},
+						Behavior: &core.Parameter_Default{
+							Default: &core.Literal{
+								Value: &core.Literal_Scalar{
+									Scalar: &core.Scalar{
+										Value: &core.Scalar_Primitive{
+											Primitive: &core.Primitive{
+												Value: &core.Primitive_Integer{
+													Integer: 10,
+												},
+											},
+										},
+									},
+								},
+							},
+						},
 					},
 				},
 			},
@@ -844,4 +859,66 @@ func TestValidateLaunchSpec(t *testing.T) {
 		err := validateLaunchSpec(ctx, lpSpec, s.CmdCtx)
 		assert.Nil(t, err)
 	})
+
+	t.Run("launchplan spec non empty schedule required param without value fail", func(t *testing.T) {
+		s := setup()
+		registerFilesSetup()
+		variableMap := map[string]*core.Variable{
+			"var1": {
+				Type: &core.LiteralType{
+					Type: &core.LiteralType_CollectionType{
+						CollectionType: &core.LiteralType{
+							Type: &core.LiteralType_Simple{
+								Simple: core.SimpleType_INTEGER,
+							},
+						},
+					},
+				},
+				Description: "var1",
+			},
+		}
+		wf := &admin.Workflow{
+			Closure: &admin.WorkflowClosure{
+				CompiledWorkflow: &core.CompiledWorkflowClosure{
+					Primary: &core.CompiledWorkflow{
+						Template: &core.WorkflowTemplate{
+							Interface: &core.TypedInterface{
+								Inputs: &core.VariableMap{
+									Variables: variableMap,
+								},
+							},
+						},
+					},
+				},
+			},
+		}
+		s.FetcherExt.OnFetchWorkflowVersionMatch(mock.Anything, mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return(wf, nil)
+		lpSpec := &admin.LaunchPlanSpec{
+			WorkflowId: &core.Identifier{
+				Project: "projectValue",
+				Domain:  "domainValue",
+				Name:    "workflowNameValue",
+				Version: "workflowVersionValue",
+			},
+			EntityMetadata: &admin.LaunchPlanMetadata{
+				Schedule: &admin.Schedule{
+					KickoffTimeInputArg: "kick_off_time_arg",
+				},
+			},
+			DefaultInputs: &core.ParameterMap{
+				Parameters: map[string]*core.Parameter{
+					"var1": {
+						Var: &core.Variable{
+							Type: &core.LiteralType{
+								Type: &core.LiteralType_Simple{Simple: core.SimpleType_INTEGER},
+							},
+						},
+					},
+				},
+			},
+		}
+		err := validateLaunchSpec(ctx, lpSpec, s.CmdCtx)
+		assert.NotNil(t, err)
+		assert.Equal(t, fmt.Errorf("param values are missing on scheduled workflow for the following params [var1]. Either specify them having a default or fixed value"), err)
+	})
 }