diff --git a/configure.ac b/configure.ac
index 631464d..820d30e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -109,7 +109,7 @@ AX_APPEND_COMPILE_FLAGS([-D_GNU_SOURCE -D_REENTRANT])
 
 AX_COMPILE_CHECK_SIZEOF(int)
 AX_COMPILE_CHECK_SIZEOF(long)
-AX_COMPILE_CHECK_SIZEOF(size_t, [#include "json_inttypes.h"])
+AX_COMPILE_CHECK_SIZEOF(size_t, [#include <stdint.h>])
 
 AC_CONFIG_FILES([
 Makefile