diff --git a/ChangeLog b/ChangeLog
index f9e4003..b1378dc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2018-07-29: Ver. 0.3-7
+  * Add "pkg-config" to "configure.ac".
+  * Check "OpenMPI" and "MPICH2" with "pkg-config"
+
 2018-05-18: Ver. 0.3-6
   * Move "rlecuyer" to Imports.
 
diff --git a/configure b/configure
index 9fd2c40..307cbe0 100755
--- a/configure
+++ b/configure
@@ -2476,7 +2476,7 @@ if test -z "${MPI_INCLUDE_PATH}" ; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking if pkg-config knows about MPICH" >&5
 $as_echo_n "checking if pkg-config knows about MPICH... " >&6; }
 
-            if "${PKG_CONFIG}" --exists mpich2; then
+            if "${PKG_CONFIG}" --exists mpich; then
         { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 
@@ -2486,9 +2486,12 @@ $as_echo "yes" >&6; }
         TMP_LIB_DIRS=`"${PKG_CONFIG}" --libs mpich`
         echo ">> TMP_LIB_DIRS = ${TMP_LIB_DIRS}"
 
+        TMP_LIB_PATH=`"${PKG_CONFIG}" --variable=libdir mpich`
+        echo ">> TMP_LIB_PATH = ${TMP_LIB_PATH}"
+
         if test "$TMP_INC_DIRS" != "" -a "$TMP_LIB_DIRS" != "" ; then
           TMP_INC=${TMP_INC_DIRS}
-          TMP_LIB=${TMP_LIB_DIRS}
+          TMP_LIB="-L${TMP_LIB_PATH} ${TMP_LIB_DIRS}"
         fi
 
         if test "$TMP_INC" != "" -a "$TMP_LIB" != "" ; then
diff --git a/configure.ac b/configure.ac
index 4e6af1b..f8835c5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -212,7 +212,7 @@ if test -z "${MPI_INCLUDE_PATH}" ; then
       AC_MSG_CHECKING([if pkg-config knows about MPICH]) 
 
       dnl I assume pkg-config only works in MPICH2
-      if "${PKG_CONFIG}" --exists mpich2; then
+      if "${PKG_CONFIG}" --exists mpich; then
         AC_MSG_RESULT([yes])
 
         TMP_INC_DIRS=`"${PKG_CONFIG}" --cflags mpich`
@@ -221,9 +221,12 @@ if test -z "${MPI_INCLUDE_PATH}" ; then
         TMP_LIB_DIRS=`"${PKG_CONFIG}" --libs mpich`
         echo ">> TMP_LIB_DIRS = ${TMP_LIB_DIRS}"
 
+        TMP_LIB_PATH=`"${PKG_CONFIG}" --variable=libdir mpich`
+        echo ">> TMP_LIB_PATH = ${TMP_LIB_PATH}"
+
         if test "$TMP_INC_DIRS" != "" -a "$TMP_LIB_DIRS" != "" ; then
           TMP_INC=${TMP_INC_DIRS}
-          TMP_LIB=${TMP_LIB_DIRS}
+          TMP_LIB="-L${TMP_LIB_PATH} ${TMP_LIB_DIRS}"
         fi
 
         if test "$TMP_INC" != "" -a "$TMP_LIB" != "" ; then
diff --git a/man/zz_comm_internal.Rd b/man/zz_comm_internal.Rd
index 8b1c28a..5220ebf 100644
--- a/man/zz_comm_internal.Rd
+++ b/man/zz_comm_internal.Rd
@@ -1,4 +1,5 @@
 \name{Comm Internal Functions}
+\alias{comm.set.errhandler}
 \alias{comm.sort.integer}
 \alias{comm.sort.double}
 \alias{comm.sort.default}