diff --git a/src/common/filesystembase.cpp b/src/common/filesystembase.cpp
index 89c6426921..ef9ba1efd6 100644
--- a/src/common/filesystembase.cpp
+++ b/src/common/filesystembase.cpp
@@ -114,17 +114,17 @@ void FileSystem::setFolderMinimumPermissions(const QString &filename)
 #endif
 }
 
-
-void FileSystem::setFileReadOnlyWeak(const QString &filename, bool readonly)
+bool FileSystem::setFileReadOnlyWeak(const QString &filename, bool readonly)
 {
     QFile file(filename);
     QFile::Permissions permissions = file.permissions();
 
     if (!readonly && (permissions & QFile::WriteOwner)) {
-        return; // already writable enough
+        return false; // already writable enough
     }
 
     setFileReadOnly(filename, readonly);
+    return true;
 }
 
 bool FileSystem::rename(const QString &originFileName,
diff --git a/src/common/filesystembase.h b/src/common/filesystembase.h
index bc0b592c23..fd0572804d 100644
--- a/src/common/filesystembase.h
+++ b/src/common/filesystembase.h
@@ -65,7 +65,7 @@ namespace FileSystem {
      * This means that it will preserve explicitly set rw-r--r-- permissions even
      * when the umask is 0002. (setFileReadOnly() would adjust to rw-rw-r--)
      */
-    void OCSYNC_EXPORT setFileReadOnlyWeak(const QString &filename, bool readonly);
+    bool OCSYNC_EXPORT setFileReadOnlyWeak(const QString &filename, bool readonly);
 
     /**
      * @brief Try to set permissions so that other users on the local machine can not