Index: configure.ac
===================================================================
--- configure.ac	(revision 214436)
+++ configure.ac	(working copy)
@@ -1305,6 +1305,12 @@
 
 AST_EXT_LIB_CHECK([PRI], [pri], [pri_keypad_facility], [libpri.h])
 
+# If there was a directory set for --with-libpri, then it applies to two other options, as well
+if test "x${PRI_DIR}" != "x"; then
+	PRI_VERSION_DIR=${PRI_DIR}
+	PRI_INBANDDISCONNECT_DIR=${PRI_DIR}
+fi
+
 AST_EXT_LIB_CHECK([PRI_VERSION], [pri], [pri_get_version], [libpri.h])
 
 AST_EXT_LIB_CHECK([PRI_INBANDDISCONNECT], [pri], [pri_set_inbanddisconnect], [libpri.h])
Index: autoconf/ast_ext_lib.m4
===================================================================
--- autoconf/ast_ext_lib.m4	(revision 214436)
+++ autoconf/ast_ext_lib.m4	(working copy)
@@ -31,8 +31,11 @@
 AC_DEFUN([AST_EXT_LIB_SETUP_DEPENDENT],
 [
 $1_DESCRIP="$2"
-m4_ifval([$4], [$1_OPTION=$4])
+m4_ifval([$4], [
+   $1_OPTION="$4"
+])
 m4_ifval([$3], [
+$1_DIR="${$3_DIR}"
 if test "x${$3_MANDATORY}" = "xyes" ; then
    $1_MANDATORY="yes"
 fi