diff --git a/packages/block-editor/src/components/image-editor/aspect-ratio-dropdown.js b/packages/block-editor/src/components/image-editor/aspect-ratio-dropdown.js
index b8432d1669f285..7c26c675a21f87 100644
--- a/packages/block-editor/src/components/image-editor/aspect-ratio-dropdown.js
+++ b/packages/block-editor/src/components/image-editor/aspect-ratio-dropdown.js
@@ -111,7 +111,9 @@ export default function AspectRatioDropdown( { toggleProps } ) {
 								onClose();
 							} }
 							value={ aspect }
-							aspectRatios={ themeRatios }
+							aspectRatios={ themeRatios.map(
+								presetRatioAsNumber
+							) }
 						/>
 					) }
 					{ showDefaultRatios && (