diff --git a/Backendless/File/Security/AbstractFilePermission.cs b/Backendless/File/Security/AbstractFilePermission.cs
index fac79a73..e2dd771e 100644
--- a/Backendless/File/Security/AbstractFilePermission.cs
+++ b/Backendless/File/Security/AbstractFilePermission.cs
@@ -119,7 +119,7 @@ private Object[] BuildArgs( String fileOrDirURL, String principal, bool isRole,
 
       permission.folder = fileOrDirURL;
       permission.access = permissionType;
-      permission.operaiton = operation;
+      permission.operation = operation;
 
       if( principal != null )
         return new Object[] { principal, permission };
diff --git a/Backendless/File/Security/BasePermission.cs b/Backendless/File/Security/BasePermission.cs
index 84fb722d..d805576d 100644
--- a/Backendless/File/Security/BasePermission.cs
+++ b/Backendless/File/Security/BasePermission.cs
@@ -8,6 +8,6 @@ abstract class BasePermission
   {
     public String folder { get; set; }
     public PermissionTypes access { get; set; }
-    public FileOperation operaiton { get; set; }
+    public FileOperation operation { get; set; }
   }
 }