diff --git a/m4/prereq.m4 b/m4/prereq.m4
index 83055eeb8..ad5e21293 100644
--- a/m4/prereq.m4
+++ b/m4/prereq.m4
@@ -82,6 +82,7 @@ AC_DEFUN([jm_PREREQ],
   AC_REQUIRE([gl_POSIXVER])
   AC_REQUIRE([gl_QUOTEARG])
   AC_REQUIRE([gl_QUOTE])
+  AC_REQUIRE([gl_READTOKENS])
   AC_REQUIRE([gl_READUTMP])
   AC_REQUIRE([gl_REGEX])
   AC_REQUIRE([gl_SAFE_READ])