diff --git a/apps/files_sharing/js/sharedfilelist.js b/apps/files_sharing/js/sharedfilelist.js
index 304f77a8d7..ea9071cfcb 100644
--- a/apps/files_sharing/js/sharedfilelist.js
+++ b/apps/files_sharing/js/sharedfilelist.js
@@ -166,11 +166,10 @@
 					}
 					else {
 						file.type = 'file';
-						// force preview retrieval as we don't have mime types,
-						// the preview endpoint will fall back to the mime type
-						// icon if no preview exists
-						file.isPreviewAvailable = true;
-						file.icon = true;
+						if (share.isPreviewAvailable) {
+							file.icon = true;
+							file.isPreviewAvailable = true;
+						}
 					}
 					file.share = {
 						id: share.id,
diff --git a/apps/files_sharing/lib/api.php b/apps/files_sharing/lib/api.php
index 2e824a4a9d..50ba74f5be 100644
--- a/apps/files_sharing/lib/api.php
+++ b/apps/files_sharing/lib/api.php
@@ -60,6 +60,9 @@ class Api {
 			foreach ($shares as &$share) {
 				if ($share['item_type'] === 'file' && isset($share['path'])) {
 					$share['mimetype'] = \OC_Helper::getFileNameMimeType($share['path']);
+					if (\OC::$server->getPreviewManager()->isMimeSupported($share['mimetype'])) {
+						$share['isPreviewAvailable'] = true;
+					}
 				}
 				$newShares[] = $share;
 			}
@@ -214,6 +217,9 @@ class Api {
 			foreach ($shares as &$share) {
 				if ($share['item_type'] === 'file') {
 					$share['mimetype'] = \OC_Helper::getFileNameMimeType($share['file_target']);
+					if (\OC::$server->getPreviewManager()->isMimeSupported($share['mimetype'])) {
+						$share['isPreviewAvailable'] = true;
+					}
 				}
 			}
 			$result = new \OC_OCS_Result($shares);