diff --git a/apis/placement/v1/clusterresourceplacement_types.go b/apis/placement/v1/clusterresourceplacement_types.go
index ee719cbf3..f5737f86d 100644
--- a/apis/placement/v1/clusterresourceplacement_types.go
+++ b/apis/placement/v1/clusterresourceplacement_types.go
@@ -500,7 +500,7 @@ type RollingUpdateConfig struct {
 	// Absolute number is calculated from percentage by rounding up.
 	// We consider a resource unavailable when we either remove it from a cluster or in-place
 	// upgrade the resources content on the same cluster.
-	// This can not be 0 if MaxSurge is 0.
+	// The minimum of MaxUnavailable is 1 to avoid rolling out stuck during in-place resource update.
 	// Defaults to 25%.
 	// +kubebuilder:default="25%"
 	// +kubebuilder:validation:XIntOrString
@@ -513,7 +513,7 @@ type RollingUpdateConfig struct {
 	// The desired number equals to the number of clusters scheduler selected when the placement type is `PickAll`.
 	// Value can be an absolute number (ex: 5) or a percentage of desire (ex: 10%).
 	// Absolute number is calculated from percentage by rounding up.
-	// This does not apply to the case that we do in-place upgrade of resources on the same cluster.
+	// This does not apply to the case that we do in-place update of resources on the same cluster.
 	// This can not be 0 if MaxUnavailable is 0.
 	// Defaults to 25%.
 	// +kubebuilder:default="25%"
diff --git a/apis/placement/v1beta1/clusterresourceplacement_types.go b/apis/placement/v1beta1/clusterresourceplacement_types.go
index 28e5fa9f6..28dbf61f4 100644
--- a/apis/placement/v1beta1/clusterresourceplacement_types.go
+++ b/apis/placement/v1beta1/clusterresourceplacement_types.go
@@ -500,7 +500,7 @@ type RollingUpdateConfig struct {
 	// Absolute number is calculated from percentage by rounding up.
 	// We consider a resource unavailable when we either remove it from a cluster or in-place
 	// upgrade the resources content on the same cluster.
-	// This can not be 0 if MaxSurge is 0.
+	// The minimum of MaxUnavailable is 1 to avoid rolling out stuck during in-place resource update.
 	// Defaults to 25%.
 	// +kubebuilder:default="25%"
 	// +kubebuilder:validation:XIntOrString
@@ -513,7 +513,7 @@ type RollingUpdateConfig struct {
 	// The desired number equals to the number of clusters scheduler selected when the placement type is `PickAll`.
 	// Value can be an absolute number (ex: 5) or a percentage of desire (ex: 10%).
 	// Absolute number is calculated from percentage by rounding up.
-	// This does not apply to the case that we do in-place upgrade of resources on the same cluster.
+	// This does not apply to the case that we do in-place update of resources on the same cluster.
 	// This can not be 0 if MaxUnavailable is 0.
 	// Defaults to 25%.
 	// +kubebuilder:default="25%"
diff --git a/pkg/utils/validator/clusterresourceplacement.go b/pkg/utils/validator/clusterresourceplacement.go
index ea868efdd..6f57c985c 100644
--- a/pkg/utils/validator/clusterresourceplacement.go
+++ b/pkg/utils/validator/clusterresourceplacement.go
@@ -365,8 +365,8 @@ func validateRolloutStrategy(rolloutStrategy placementv1beta1.RolloutStrategy) e
 			if err != nil {
 				allErr = append(allErr, fmt.Errorf("maxUnavailable `%+v` is invalid: %w", rolloutStrategy.RollingUpdate.MaxUnavailable, err))
 			}
-			if value < 0 {
-				allErr = append(allErr, fmt.Errorf("maxUnavailable must be greater than or equal to 0, got `%+v`", rolloutStrategy.RollingUpdate.MaxUnavailable))
+			if value < 1 {
+				allErr = append(allErr, fmt.Errorf("maxUnavailable must be greater than or equal to 1, got `%+v`", rolloutStrategy.RollingUpdate.MaxUnavailable))
 			}
 		}
 		if rolloutStrategy.RollingUpdate.MaxSurge != nil {
diff --git a/pkg/utils/validator/clusterresourceplacement_test.go b/pkg/utils/validator/clusterresourceplacement_test.go
index 2924c7ccb..2fab6c8e2 100644
--- a/pkg/utils/validator/clusterresourceplacement_test.go
+++ b/pkg/utils/validator/clusterresourceplacement_test.go
@@ -426,7 +426,20 @@ func TestValidateClusterResourcePlacement_RolloutStrategy(t *testing.T) {
 				},
 			},
 			wantErr:    true,
-			wantErrMsg: "maxUnavailable must be greater than or equal to 0, got `-10`",
+			wantErrMsg: "maxUnavailable must be greater than or equal to 1, got `-10`",
+		},
+		"invalid rollout strategy - zero MaxUnavailable": {
+			strategy: placementv1beta1.RolloutStrategy{
+				Type: placementv1beta1.RollingUpdateRolloutStrategyType,
+				RollingUpdate: &placementv1beta1.RollingUpdateConfig{
+					MaxUnavailable: &intstr.IntOrString{
+						Type:   0,
+						IntVal: 0,
+					},
+				},
+			},
+			wantErr:    true,
+			wantErrMsg: "maxUnavailable must be greater than or equal to 1, got `0`",
 		},
 		"invalid rollout strategy - % error MaxSurge": {
 			strategy: placementv1beta1.RolloutStrategy{