diff --git a/ext/readline/config.m4 b/ext/readline/config.m4
index e8c6b91c6801b..03958359316a0 100644
--- a/ext/readline/config.m4
+++ b/ext/readline/config.m4
@@ -58,13 +58,20 @@ if test "$PHP_READLINE" && test "$PHP_READLINE" != "no"; then
     -L$READLINE_DIR/$PHP_LIBDIR $PHP_READLINE_LIBS
   ])
 
-  PHP_CHECK_LIBRARY(edit, rl_on_new_line,
+  PHP_CHECK_LIBRARY(readline, rl_on_new_line,
   [
     AC_DEFINE(HAVE_RL_ON_NEW_LINE, 1, [ ])
   ],[],[
     -L$READLINE_DIR/$PHP_LIBDIR $PHP_READLINE_LIBS
   ])
 
+  PHP_CHECK_LIBRARY(readline, rl_completion_matches,
+  [
+    AC_DEFINE(HAVE_RL_COMPLETION_MATCHES, 1, [ ])
+  ],[],[
+    -L$READLINE_DIR/$PHP_LIBDIR $PHP_READLINE_LIBS
+  ])
+
   AC_DEFINE(HAVE_LIBREADLINE, 1, [ ])
 
 elif test "$PHP_LIBEDIT" != "no"; then
@@ -112,11 +119,17 @@ elif test "$PHP_LIBEDIT" != "no"; then
     -L$READLINE_DIR/$PHP_LIBDIR
   ])
 
+  PHP_CHECK_LIBRARY(edit, rl_completion_matches,
+  [
+    AC_DEFINE(HAVE_RL_COMPLETION_MATCHES, 1, [ ])
+  ],[],[
+    -L$READLINE_DIR/$PHP_LIBDIR $PHP_READLINE_LIBS
+  ])
+
   AC_DEFINE(HAVE_LIBEDIT, 1, [ ])
 fi
 
 if test "$PHP_READLINE" != "no" || test "$PHP_LIBEDIT" != "no"; then
-  AC_CHECK_FUNCS([rl_completion_matches])
   PHP_NEW_EXTENSION(readline, readline.c readline_cli.c, $ext_shared, cli)
   PHP_SUBST(READLINE_SHARED_LIBADD)
 fi