diff --git a/library/lammpi/CMakeLists.txt b/library/lammpi/CMakeLists.txt
index ff6a134a8..80f0ac643 100644
--- a/library/lammpi/CMakeLists.txt
+++ b/library/lammpi/CMakeLists.txt
@@ -2,7 +2,7 @@
 set (MPI_SOURCES
   hash.c prologterms2c.c yap_mpi.c)
 
-  macro_optional_find_package(MPI ON)
+  macro_optional_find_package(Mpi ON)
   macro_log_feature (MPI_C_FOUND "Mpi"
     "Use Mpi System"
     "http://www.mpi.org" FALSE)