diff --git a/src/EngineKit/Extensions/ToGLExtensions.cs b/src/EngineKit/Extensions/ToGLExtensions.cs
index ef4cbe5..beae1c1 100644
--- a/src/EngineKit/Extensions/ToGLExtensions.cs
+++ b/src/EngineKit/Extensions/ToGLExtensions.cs
@@ -50,7 +50,7 @@ public static uint ToGL(this StorageAllocationFlags storageAllocationFlags)
         result |= (storageAllocationFlags & StorageAllocationFlags.Dynamic) == StorageAllocationFlags.Dynamic ? (uint)GL.BufferStorageFlags.DynamicStorageBit : 0;
         result |= (storageAllocationFlags & StorageAllocationFlags.Client) == StorageAllocationFlags.Client ? (uint)GL.BufferStorageFlags.ClientStorageBit : 0;
         result |= (storageAllocationFlags & StorageAllocationFlags.Mappable) == StorageAllocationFlags.Mappable
-            ? (uint)(GL.MapFlags.Persistent | GL.MapFlags.Coherent)
+            ? (uint)(GL.MapFlags.Read | GL.MapFlags.Write | GL.MapFlags.Persistent | GL.MapFlags.Coherent)
             : 0;
         return result;
     }