Index: /issm/trunk-jpl/m4/issm_options.m4
===================================================================
--- /issm/trunk-jpl/m4/issm_options.m4	(revision 27916)
+++ /issm/trunk-jpl/m4/issm_options.m4	(revision 27917)
@@ -2435,4 +2435,5 @@
 	AC_MSG_RESULT([${FORTRAN}])
 
+	HAVE_FORTRANDIR=no
 	if test "x${FORTRAN}" == "xyes"; then
 		dnl Fortran library
@@ -2448,7 +2449,9 @@
 			if test -d "${FORTRAN_DIR}" || test -f "${FORTRAN_DIR}"; then
 				FORTRANDIR="${FORTRAN_DIR}"
+				if -n "${FORTRAN_DIR}"; then
+					HAVE_FORTRANDIR=yes
+				fi
 				FORTRANLIB="${FORTRAN_LIB}"
 				AC_DEFINE([_HAVE_FORTRAN_], [1], [with Fortran library in ISSM src])
-				AM_CONDITIONAL([HAVE_FORTRANDIR], [test "x${FORTRANDIR}" != "x"])
 				AC_SUBST([FORTRANDIR])
 				AC_SUBST([FORTRANLIB])
@@ -2465,4 +2468,5 @@
 		AC_MSG_RESULT([done])
 	fi
+	AM_CONDITIONAL([HAVE_FORTRANDIR], [HAVE_FORTRANDIR])
 	dnl }}}
 	dnl Xlib (graphics library){{{