diff --git a/include/mpi.h b/include/mpi.h
index 36bda981d2..7ce9edab2f 100644
--- a/include/mpi.h
+++ b/include/mpi.h
@@ -294,7 +294,7 @@ enum {
 /*
  * Datatype combiners.
  */
-OMPI_DECLSPEC enum {
+enum {
   MPI_COMBINER_NAMED,
   MPI_COMBINER_DUP,
   MPI_COMBINER_CONTIGUOUS,