diff --git a/INSTALL.swift b/INSTALL.swift
index a4a2a9208c9443aacc796c87dfe1b96ee88fbb34..bd49dfffd641a3ad59ec25284b14685afb9f7b24 100644
--- a/INSTALL.swift
+++ b/INSTALL.swift
@@ -88,6 +88,9 @@ Before running configure the "mpirun" command should be available in the
 shell. If your command isn't called "mpirun" then define the "MPIRUN"
 environment variable, either in the shell or when running configure.
 
+The MPI compiler can be controlled using the MPICC variable, much like
+the CC one. Use this when your MPI compiler has a none-standard name.
+
 
 METIS: a build of the METIS library can be optionally used to optimize the
 load between MPI nodes (requires an MPI library). This should be found in