diff --git a/paddle/fluid/operators/class_center_sample_op.cu b/paddle/fluid/operators/class_center_sample_op.cu
index 236f783017dcccde80dc94840a7509190912089b..a0642694843e8afe73a9947876ee93648d402449 100644
--- a/paddle/fluid/operators/class_center_sample_op.cu
+++ b/paddle/fluid/operators/class_center_sample_op.cu
@@ -220,6 +220,12 @@ class NotEqualToPreviousAdjacentIterator {
     return ret;
   }
 
+  template <typename Distance>
+  __host__ __device__ __forceinline__ self_type operator-(Distance n) const {
+    self_type ret(arr_, offset_ - n);
+    return ret;
+  }
+
   template <typename Distance>
   __host__ __device__ __forceinline__ reference operator[](Distance n) const {
     return *(*this + n);