diff --git a/vector.go b/vector.go
index 7a873e7..282413b 100644
--- a/vector.go
+++ b/vector.go
@@ -95,3 +95,15 @@ const TrainingKey = "_training"
 const TrainedIndexCallback = "_trained_index_callback"
 
 type TrainedIndexCallbackFn func(string) (interface{}, error)
+
+// GPU vector search error callbacks
+
+// Called when an index move from CPU to CPU fails
+const CPUToGPUCloneErrorKey = "_cpu_to_gpu_clone_error"
+
+type CPUToGPUCloneErrorCallback func(err error)
+
+// Called when a generic error occurs on the GPU
+const GPUErrorKey = "_gpu_error"
+
+type GPUErrorCallback func(err error)