diff --git a/ext/session/config.m4 b/ext/session/config.m4
index bc8001f85a4..f9222f0858e 100644
--- a/ext/session/config.m4
+++ b/ext/session/config.m4
@@ -12,7 +12,7 @@ if test "$PHP_SESSION" != "no"; then
   PHP_PWRITE_TEST
   PHP_PREAD_TEST
   PHP_NEW_EXTENSION(session, session.c mod_files.c mod_mm.c mod_user.c, $ext_shared)
-  PHP_ADD_EXTENSION_DEP(session, hash)
+  PHP_ADD_EXTENSION_DEP(session, hash, true)
   PHP_SUBST(SESSION_SHARED_LIBADD)
   PHP_INSTALL_HEADERS(ext/session, [php_session.h mod_files.h mod_user.h])
   AC_DEFINE(HAVE_PHP_SESSION,1,[ ])