diff --git a/etc/apps/scotch/bashrc b/etc/apps/scotch/bashrc
index 333662722a4b6d009f2c33a55aa3b8a5a9ea0cbb..fcd19bfaa35cd49306fb7e6901c6efc948f1f82b 100644
--- a/etc/apps/scotch/bashrc
+++ b/etc/apps/scotch/bashrc
@@ -36,4 +36,10 @@
 export SCOTCH_VERSION=scotch_5.1.11
 export SCOTCH_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$SCOTCH_VERSION
 
+# mpi-qualified include directory
+export SCOTCH_MPI_INCLUDE=$SCOTCH_ARCH_PATH/include/${FOAM_MPI_LIBBIN##*/}
+
+# mpi-qualified lib directory
+export SCOTCH_MPI_LIBBIN=$SCOTCH_ARCH_PATH/lib/${FOAM_MPI_LIBBIN##*/}
+
 # -----------------------------------------------------------------------------
diff --git a/src/parallel/decompose/Allwmake b/src/parallel/decompose/Allwmake
index 22515e65d2f57824c54f2b7941816b0a60a740ac..cb053bcc3e811423065066a35578544f55d49fda 100755
--- a/src/parallel/decompose/Allwmake
+++ b/src/parallel/decompose/Allwmake
@@ -1,7 +1,7 @@
 #!/bin/sh
 cd ${0%/*} || exit 1    # run from this directory
 
-# get SCOTCH_VERSION, SCOTCH_ARCH_PATH
+# get SCOTCH_VERSION, SCOTCH_ARCH_PATH, SCOTCH_MPI_INCLUDE
 settings=`$WM_PROJECT_DIR/bin/foamEtcFile apps/scotch/bashrc`
 if [ -f "$settings" ]
 then
diff --git a/src/parallel/decompose/ptscotchDecomp/Make/options b/src/parallel/decompose/ptscotchDecomp/Make/options
index 17e6ea5ced3c94e62916539cec9bf1906b7c9be5..d4f56eb39a42e7e3a48d3eeda17d20f2384bc525 100644
--- a/src/parallel/decompose/ptscotchDecomp/Make/options
+++ b/src/parallel/decompose/ptscotchDecomp/Make/options
@@ -3,7 +3,7 @@ sinclude $(RULES)/mplib$(WM_MPLIB)
 
 EXE_INC = \
     $(PFLAGS) $(PINC) \
-    -I$(SCOTCH_ARCH_PATH)/include \
+    -I$(SCOTCH_MPI_INCLUDE) \
     -I/usr/include/scotch \
     -I../decompositionMethods/lnInclude