diff --git a/sit b/sit
index 3f0319e..ff3b6f1 100755
--- a/sit
+++ b/sit
@@ -97,23 +97,37 @@ if [ ! -z "$MPI" ] ; then
     MPI_MODULE="mpi/$MPI"
     if [ ! -z "$MPI_VERSION" ] ; then
         MPI_VERSION_NUM=${MPI_VERSION%%-*}
-        MPI_MODULE=${MPI_MODULE}${MPI_VERSION_NUM:+"/${MPI_VERSION_NUM}-$COMPILER-$COMPILER_VERSION"}
+        case $MPI in
+            impi)
+                MPI_MODULE=${MPI_MODULE}${MPI_VERSION_NUM:+"/${MPI_VERSION_NUM}"}
+                ;;
+            *)
+                MPI_MODULE=${MPI_MODULE}${MPI_VERSION_NUM:+"/${MPI_VERSION_NUM}-$COMPILER-$COMPILER_VERSION"}
+                ;;
+        esac
     fi  
     echo "Loading MPI module ${MPI_MODULE}"
     module load $MPI_MODULE
-    case $COMPILER in
-        gnu)
-           MPICC="mpicc"
-           MPICXX="mpicxx"
-           MPIFC="mpif90"
-        ;;
-        intel)
-           MPICC="mpiicc"
-           MPICXX="mpiicpc"
-           MPIFC="mpiifort"
-        ;;
-    esac
 
+    case $COMPILER in
+	intel)
+            if [[ $mpi == "impi" ]] ; then
+		MPICC="mpiicc"
+		MPICXX="mpiicpc"
+		MPIFC="mpiifort"
+            else
+		MPICC="mpicc"
+		MPICXX="mpicxx"
+		MPIFC="mpif90"
+            fi
+	    ;;
+	gnu|*)
+	    MPICC="mpicc"
+	    MPICXX="mpicxx"
+	    MPIFC="mpif90"
+	    ;;
+    esac
+    echo "MPI compiler env: MPICC=$MPICC, MPICXX=$MPICXX, MPIFC=$MPIFC"
     MPI_DIR=${MPI_DIR:=$(dirname $(dirname $(which $MPICC)))}
 fi