diff --git a/packages/block-library/src/post-author-name/edit.js b/packages/block-library/src/post-author-name/edit.js
index 8c0281edb5df8a..5df47e447195b4 100644
--- a/packages/block-library/src/post-author-name/edit.js
+++ b/packages/block-library/src/post-author-name/edit.js
@@ -132,15 +132,15 @@ function PostAuthorNameEdit( {
 				</ToolsPanel>
 			</InspectorControls>
 			<div { ...blockProps }>
-				{ supportsAuthor
-					? displayAuthor
-					: sprintf(
+				{ ! supportsAuthor && postType !== undefined
+					? sprintf(
 							// translators: %s: Name of the post type e.g: "post".
 							__(
 								'This post type (%s) does not support the author.'
 							),
 							postType
-					  ) }
+					  )
+					: displayAuthor }
 			</div>
 		</>
 	);
diff --git a/packages/block-library/src/post-author/edit.js b/packages/block-library/src/post-author/edit.js
index dd2b3aa617548d..f41fbf707ecc44 100644
--- a/packages/block-library/src/post-author/edit.js
+++ b/packages/block-library/src/post-author/edit.js
@@ -99,7 +99,7 @@ function PostAuthorEdit( {
 	const showAuthorControl =
 		!! postId && ! isDescendentOfQueryLoop && authorOptions.length > 0;
 
-	if ( ! supportsAuthor ) {
+	if ( ! supportsAuthor && postType !== undefined ) {
 		return (
 			<div { ...blockProps }>
 				{ sprintf(