diff --git a/tool/m4/ruby_replace_type.m4 b/tool/m4/ruby_replace_type.m4
index d891c4b390..a7d2ffe938 100644
--- a/tool/m4/ruby_replace_type.m4
+++ b/tool/m4/ruby_replace_type.m4
@@ -1,7 +1,7 @@
 # -*- Autoconf -*-
 dnl RUBY_REPLACE_TYPE [typename] [default type] [macro type] [included]
 AC_DEFUN([RUBY_REPLACE_TYPE], [dnl
-    AC_CHECK_TYPE([$1],
+    AC_CHECK_TYPES([$1],
 		  [n="patsubst([$1],["],[\\"])"],
 		  [n="patsubst([$2],["],[\\"])"],
 		  [$4])