diff --git a/cmake/KokkosComm_config.hpp.in b/cmake/KokkosComm_config.hpp.in
index 81bf9a1..55d9775 100644
--- a/cmake/KokkosComm_config.hpp.in
+++ b/cmake/KokkosComm_config.hpp.in
@@ -21,3 +21,4 @@
 #define KOKKOSCOMM_VERSION_PATCH @KOKKOSCOMM_VERSION_PATCH@
 
 #cmakedefine KOKKOSCOMM_ENABLE_MPI
+#cmakedefine KOKKOSCOMM_ENABLE_NCCL