diff --git a/Allwmake b/Allwmake
index 2d345a89..977a53e2 100755
--- a/Allwmake
+++ b/Allwmake
@@ -330,6 +330,24 @@ then
     (
         set -x
         cd $METIS_VERSION  || exit 1
+
+        if [ "$WM_PRECISION_OPTION" = "DP" ]
+        then
+            FLOAT_PRECISION=64
+        elif [ "$WM_PRECISION_OPTION" = "SP" ]
+        then
+            FLOAT_PRECISION=32
+        else
+            echo " Metis pre-configure error:"
+            echo "    WM_PRECISION_OPTION is neither DP nor SP"
+            exit 1
+        fi
+
+        # Change user settings automatically
+        sed -i -e 's=\(#define IDXTYPEWIDTH\).*=\1 '$WM_LABEL_SIZE'=' \
+               -e 's=\(#define REALTYPEWIDTH\).*=\1 '$FLOAT_PRECISION'=' \
+            include/metis.h
+
         make config shared=1 prefix=$METIS_ARCH_PATH
         make -j $WM_NCOMPPROCS install
         cp $METIS_ARCH_PATH/lib/libmetis.so $FOAM_EXT_LIBBIN