diff --git a/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp b/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
index b23b8e66..913c02bf 100644
--- a/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
+++ b/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
@@ -160,9 +160,11 @@ namespace MobileGL {
                 *params = 0; // TODO
                 break;
             case GL_ARRAY_BUFFER_BINDING: {
-                *params = MG_State::pGLContext->GetBufferBindingSlot(BufferTarget::Vertex)
-                              .GetBoundObject()
-                              ->GetExternalIndex();
+                auto obj = MG_State::pGLContext->GetBufferBindingSlot(BufferTarget::Vertex).GetBoundObject();
+                if (obj)
+                    *params = obj->GetExternalIndex();
+                else
+                    *params = 0;
                 break;
             }
             case GL_BLEND: