diff --git a/ompi/mca/osc/rdma/osc_rdma.h b/ompi/mca/osc/rdma/osc_rdma.h
index c17cbb4d210..8cf83991d7c 100644
--- a/ompi/mca/osc/rdma/osc_rdma.h
+++ b/ompi/mca/osc/rdma/osc_rdma.h
@@ -753,7 +753,7 @@ static inline int osc_rdma_accelerator_mem_move(void *dest, const void *src, siz
  * @retval >0                 The buffer belongs to a managed buffer in
  *                            device memory.
  */
-static inline int osc_rdma_is_accel(void *buf)
+static inline int osc_rdma_is_accel(const void *buf)
 {
     int dev_id;
     uint64_t flags;