diff --git a/internal/services/compute/image_resource.go b/internal/services/compute/image_resource.go
index 099275fa026e..ff17ba8e6300 100644
--- a/internal/services/compute/image_resource.go
+++ b/internal/services/compute/image_resource.go
@@ -130,6 +130,7 @@ func resourceImage() *pluginsdk.Resource {
 							Type:         pluginsdk.TypeInt,
 							Computed:     true,
 							Optional:     true,
+							ForceNew:     true,
 							ValidateFunc: validation.NoZeroValues,
 						},
 					},
diff --git a/website/docs/r/image.html.markdown b/website/docs/r/image.html.markdown
index a938650d2f45..4d6e229cb79f 100644
--- a/website/docs/r/image.html.markdown
+++ b/website/docs/r/image.html.markdown
@@ -123,7 +123,7 @@ The `os_disk` block supports the following:
 * `managed_disk_id` - (Optional) Specifies the ID of the managed disk resource that you want to use to create the image.
 * `blob_uri` - (Optional) Specifies the URI in Azure storage of the blob that you want to use to create the image. Changing this forces a new resource to be created.
 * `caching` - (Optional) Specifies the caching mode as `ReadWrite`, `ReadOnly`, or `None`. The default is `None`.
-* `size_gb` - (Optional) Specifies the size of the image to be created. The target size can't be smaller than the source size.
+* `size_gb` - (Optional) Specifies the size of the image to be created. Changing this forces a new resource to be created.
 
 ---