Index: /issm/trunk-jpl/m4/issm_options.m4
===================================================================
--- /issm/trunk-jpl/m4/issm_options.m4	(revision 15715)
+++ /issm/trunk-jpl/m4/issm_options.m4	(revision 15716)
@@ -170,5 +170,5 @@
 	if test "x$HAVE_TRIANGLE" = "xyes"; then
 		TRIANGLEINCL=-I$TRIANGLE_ROOT/
-		AC_CHECK_HEADER($TRIANGLE_ROOT/triangle.h,[],[AC_MSG_ERROR([Couldn't find triangle.h... check your installation of triangle])])
+	   AC_CHECK_FILE($TRIANGLE_ROOT/triangle.h,[],[AC_MSG_ERROR([Couldn't find triangle.h... check your installation of triangle])])
 		case "${host_os}" in
 				*cygwin*)