diff --git a/config/crd/bases/pgbackrest.cnpg.opera.com_archives.yaml b/config/crd/bases/pgbackrest.cnpg.opera.com_archives.yaml
index 19ea7aa..6e3e2f0 100644
--- a/config/crd/bases/pgbackrest.cnpg.opera.com_archives.yaml
+++ b/config/crd/bases/pgbackrest.cnpg.opera.com_archives.yaml
@@ -279,8 +279,13 @@ spec:
                               - name
                               type: object
                             uriStyle:
-                              description: S3 Repository URI style, either "host"
-                                (default) or "path".
+                              description: |-
+                                S3 Repository URI style. Use "path" for S3-compatible stores (e.g. MinIO) at
+                                internal endpoints that cannot resolve virtual-hosted-style DNS names.
+                                Defaults to pgbackrest's own default ("host") when unset.
+                              enum:
+                              - host
+                              - path
                               type: string
                           type: object
                       required:
diff --git a/internal/pgbackrest/api/config.go b/internal/pgbackrest/api/config.go
index 38b87d5..994495c 100644
--- a/internal/pgbackrest/api/config.go
+++ b/internal/pgbackrest/api/config.go
@@ -71,6 +71,18 @@ const (
 	KeyTypeWebID = KeyType("web-id")
 )
 
+// URIStyleType is the URI addressing style for S3-compatible repositories
+type URIStyleType string
+
+const (
+	// URIStyleHost uses virtual-hosted-style URIs (default): <bucket>.<endpoint>/key
+	URIStyleHost = URIStyleType("host")
+	// URIStylePath uses path-style URIs: <endpoint>/<bucket>/key
+	// Required for S3-compatible stores (e.g. MinIO) hosted at internal cluster endpoints
+	// that do not resolve virtual-hosted-style DNS names.
+	URIStylePath = URIStyleType("path")
+)
+
 // S3Credentials is the type for the credentials to be used to upload
 // files to S3. It can be provided in two alternative ways:
 //
@@ -96,10 +108,12 @@ type S3Credentials struct {
 	// +kubebuilder:validation:MinLength=1
 	Region string `json:"region,omitempty"`
 
-	// S3 Repository URI style, either "host" (default) or "path".
-	// TODO: Enforce values via Enum like iin compression.
+	// S3 Repository URI style. Use "path" for S3-compatible stores (e.g. MinIO) at
+	// internal endpoints that cannot resolve virtual-hosted-style DNS names.
+	// Defaults to pgbackrest's own default ("host") when unset.
+	// +kubebuilder:validation:Enum=host;path
 	// +optional
-	URIStyle string `json:"uriStyle,omitempty"`
+	URIStyle URIStyleType `json:"uriStyle,omitempty"`
 }
 
 // PgbackrestCredentials an object containing the potential credentials for each cloud provider
diff --git a/internal/pgbackrest/command/commandbuilder.go b/internal/pgbackrest/command/commandbuilder.go
index 23f1a08..975271d 100644
--- a/internal/pgbackrest/command/commandbuilder.go
+++ b/internal/pgbackrest/command/commandbuilder.go
@@ -181,7 +181,7 @@ func appendCloudProviderOptions(
 			options = append(
 				options,
 				utils.FormatRepoFlag(repoIndex, "s3-uri-style"),
-				repository.AWS.URIStyle)
+				string(repository.AWS.URIStyle))
 		}
 	}
 	return options, nil
diff --git a/internal/pgbackrest/command/commandbuilder_test.go b/internal/pgbackrest/command/commandbuilder_test.go
index 0f6ce4b..1eb1a39 100644
--- a/internal/pgbackrest/command/commandbuilder_test.go
+++ b/internal/pgbackrest/command/commandbuilder_test.go
@@ -64,6 +64,63 @@ var _ = Describe("pgbackrestWalRestoreOptions", func() {
 	})
 })
 
+var _ = Describe("appendCloudProviderOptions", func() {
+	It("should include s3-uri-style flag when URIStyle is set to path", func(ctx SpecContext) {
+		conf := &pgbackrestApi.PgbackrestConfiguration{
+			Repositories: []pgbackrestApi.PgbackrestRepository{
+				{
+					Bucket:          "my-bucket",
+					DestinationPath: "/",
+					PgbackrestCredentials: pgbackrestApi.PgbackrestCredentials{
+						AWS: &pgbackrestApi.S3Credentials{
+							URIStyle: pgbackrestApi.URIStylePath,
+						},
+					},
+				},
+			},
+		}
+		var empty []string
+		options, err := AppendCloudProviderOptionsFromConfiguration(ctx, empty, conf)
+		Expect(err).ToNot(HaveOccurred())
+		Expect(strings.Join(options, " ")).To(ContainSubstring("--repo1-s3-uri-style path"))
+	})
+
+	It("should include s3-uri-style flag when URIStyle is set to host", func(ctx SpecContext) {
+		conf := &pgbackrestApi.PgbackrestConfiguration{
+			Repositories: []pgbackrestApi.PgbackrestRepository{
+				{
+					Bucket:          "my-bucket",
+					DestinationPath: "/",
+					PgbackrestCredentials: pgbackrestApi.PgbackrestCredentials{
+						AWS: &pgbackrestApi.S3Credentials{
+							URIStyle: pgbackrestApi.URIStyleHost,
+						},
+					},
+				},
+			},
+		}
+		var empty []string
+		options, err := AppendCloudProviderOptionsFromConfiguration(ctx, empty, conf)
+		Expect(err).ToNot(HaveOccurred())
+		Expect(strings.Join(options, " ")).To(ContainSubstring("--repo1-s3-uri-style host"))
+	})
+
+	It("should omit s3-uri-style flag when URIStyle is empty", func(ctx SpecContext) {
+		conf := &pgbackrestApi.PgbackrestConfiguration{
+			Repositories: []pgbackrestApi.PgbackrestRepository{
+				{
+					Bucket:          "my-bucket",
+					DestinationPath: "/",
+				},
+			},
+		}
+		var empty []string
+		options, err := AppendCloudProviderOptionsFromConfiguration(ctx, empty, conf)
+		Expect(err).ToNot(HaveOccurred())
+		Expect(strings.Join(options, " ")).NotTo(ContainSubstring("s3-uri-style"))
+	})
+})
+
 var _ = Describe("PgbackrestRetention", func() {
 	var config *pgbackrestApi.PgbackrestConfiguration
 	var history int32 = 8
diff --git a/test/e2e/internal/objectstore/minio.go b/test/e2e/internal/objectstore/minio.go
index 4fbe332..f4213b5 100644
--- a/test/e2e/internal/objectstore/minio.go
+++ b/test/e2e/internal/objectstore/minio.go
@@ -334,7 +334,7 @@ func NewMinioArchive(namespace, name, minioOSName string, maxParallel int) *plug
 								Region: "dummy",
 								// There is no ingress that would provide domain-based
 								// routing.
-								URIStyle: "path",
+								URIStyle: pgbackrestApi.URIStylePath,
 							},
 						},
 						EndpointURL: net.JoinHostPort(minioOSName, "9000"),