diff --git a/m4/tsearch.m4 b/m4/tsearch.m4
index 24b35ce2..e311a633 100644
--- a/m4/tsearch.m4
+++ b/m4/tsearch.m4
@@ -4,7 +4,7 @@ dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
-AC_DEFUN([gl_FUNC_TSEARCH],
+AC_DEFUN([FUNC_TSEARCH],
 [
   AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
   AC_CHECK_FUNCS([tsearch])