diff --git a/moo/configure b/moo/configure
index 3ee3c21..c6d52a7 100755
--- a/moo/configure
+++ b/moo/configure
@@ -19962,6 +19962,38 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
 fi
 
 
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for PATH_MAX" >&5
+$as_echo_n "checking for PATH_MAX... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+	#include <limits.h>
+int
+main ()
+{
+;;;;;;;;;;
+PATH_MAX
+  ;
+  return 0;
+}
+
+_ACEOF
+_value_of_path_max="`$ac_cv_prog_CPP conftest.c | awk '/;;;;;;;;;;/ { start=1 } /^(0|1|2|3|4|5|6|7|8|9)(0|1|2|3|4|5|6|7|8|9)*/ { if (start == 1) { print $0; start++; } }'`"
+if test "x${_value_of_path_max}" = "x"
+then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: not defined" >&5
+$as_echo "not defined" >&6; }
+else
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ${_value_of_path_max}" >&5
+$as_echo "${_value_of_path_max}" >&6; }
+
+cat >>confdefs.h <<_ACEOF
+#define MOO_PATH_MAX ${_value_of_path_max}
+_ACEOF
+
+fi
+
 # The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
diff --git a/moo/configure.ac b/moo/configure.ac
index 4404a4b..653a77c 100644
--- a/moo/configure.ac
+++ b/moo/configure.ac
@@ -253,6 +253,23 @@ AC_TRY_RUN(
 	]
 )
 
+
+AC_MSG_CHECKING([for PATH_MAX])
+AC_LANG_CONFTEST([
+	AC_LANG_PROGRAM(
+		[#include <limits.h>],
+		[;;;;;;;;;;
+PATH_MAX])
+])
+_value_of_path_max="`$ac_cv_prog_CPP conftest.c | awk '/;;;;;;;;;;/ { start=1 } /^(0|1|2|3|4|5|6|7|8|9)(0|1|2|3|4|5|6|7|8|9)*/ { if (start == 1) { print $0; start++; } }'`"
+if test "x${_value_of_path_max}" = "x"
+then
+	AC_MSG_RESULT(not defined)
+else
+	AC_MSG_RESULT(${_value_of_path_max})
+	AC_DEFINE_UNQUOTED(MOO_PATH_MAX, ${_value_of_path_max}, [PATH_MAX])
+fi
+
 dnl check the size of primitive data types
 AC_CHECK_SIZEOF(char,,[[]])
 AC_CHECK_SIZEOF(short,,[[]])
diff --git a/moo/lib/moo-cfg.h.in b/moo/lib/moo-cfg.h.in
index 5f9916b..24a3b59 100644
--- a/moo/lib/moo-cfg.h.in
+++ b/moo/lib/moo-cfg.h.in
@@ -416,6 +416,9 @@
 /* Patch level */
 #undef MOO_PACKAGE_VERSION_PATCH
 
+/* PATH_MAX */
+#undef MOO_PATH_MAX
+
 /* Define if sa_family_t is signed */
 #undef MOO_SA_FAMILY_T_IS_SIGNED