diff --git a/apps/files_sharing/api/remote.php b/apps/files_sharing/api/remote.php
index 06b2e6c1687ec051ef81b6be7f2787958dfa0f6c..4b7192994a75e5cdefa13ebabbb2170ab7e2a45c 100644
--- a/apps/files_sharing/api/remote.php
+++ b/apps/files_sharing/api/remote.php
@@ -63,7 +63,7 @@ class Remote {
 			\OC_User::getUser()
 		);
 
-		if ($externalManager->acceptShare($params['id'])) {
+		if ($externalManager->acceptShare((int) $params['id'])) {
 			return new \OC_OCS_Result();
 		}
 
@@ -86,7 +86,7 @@ class Remote {
 			\OC_User::getUser()
 		);
 
-		if ($externalManager->declineShare($params['id'])) {
+		if ($externalManager->declineShare((int) $params['id'])) {
 			return new \OC_OCS_Result();
 		}