diff --git a/src/Aspire.Hosting.Redis/RedisBuilderExtensions.cs b/src/Aspire.Hosting.Redis/RedisBuilderExtensions.cs
index 60e1d65fe98..e6b71478e3f 100644
--- a/src/Aspire.Hosting.Redis/RedisBuilderExtensions.cs
+++ b/src/Aspire.Hosting.Redis/RedisBuilderExtensions.cs
@@ -433,7 +433,7 @@ public static IResourceBuilder<RedisResource> WithPassword(this IResourceBuilder
     /// <param name="builder">The resource builder.</param>
     /// <param name="port">The port to bind on the host. If <see langword="null"/> is used random port will be assigned.</param>
     /// <returns>The <see cref="IResourceBuilder{T}"/>.</returns>
-    public static IResourceBuilder<RedisResource> WithHostPort(this IResourceBuilder<RedisResource> builder, int port)
+    public static IResourceBuilder<RedisResource> WithHostPort(this IResourceBuilder<RedisResource> builder, int? port)
     {
         ArgumentNullException.ThrowIfNull(builder);
         return builder.WithEndpoint(RedisResource.PrimaryEndpointName, endpoint =>
diff --git a/src/Aspire.Hosting.SqlServer/SqlServerBuilderExtensions.cs b/src/Aspire.Hosting.SqlServer/SqlServerBuilderExtensions.cs
index f7345700e7d..563511f9932 100644
--- a/src/Aspire.Hosting.SqlServer/SqlServerBuilderExtensions.cs
+++ b/src/Aspire.Hosting.SqlServer/SqlServerBuilderExtensions.cs
@@ -221,7 +221,7 @@ public static IResourceBuilder<SqlServerServerResource> WithPassword(this IResou
     /// <param name="builder">The resource builder.</param>
     /// <param name="port">The port to bind on the host. If <see langword="null"/> is used random port will be assigned.</param>
     /// <returns>The <see cref="IResourceBuilder{T}"/>.</returns>
-    public static IResourceBuilder<SqlServerServerResource> WithHostPort(this IResourceBuilder<SqlServerServerResource> builder, int port)
+    public static IResourceBuilder<SqlServerServerResource> WithHostPort(this IResourceBuilder<SqlServerServerResource> builder, int? port)
     {
         ArgumentNullException.ThrowIfNull(builder);
         return builder.WithEndpoint(SqlServerServerResource.PrimaryEndpointName, endpoint =>