diff --git a/packages/block-library/src/gallery/block.json b/packages/block-library/src/gallery/block.json
index e9018704bf6bf..6a2129ec1e056 100644
--- a/packages/block-library/src/gallery/block.json
+++ b/packages/block-library/src/gallery/block.json
@@ -112,6 +112,16 @@
 	"supports": {
 		"anchor": true,
 		"align": true,
+		"__experimentalBorder": {
+			"radius": true,
+			"color": true,
+			"width": true,
+			"style": true,
+			"__experimentalDefaultControls": {
+				"color": true,
+				"radius": true
+			}
+		},
 		"html": false,
 		"units": [ "px", "em", "rem", "vh", "vw" ],
 		"spacing": {