diff --git a/configure.ac b/configure.ac
index b60c013..80d1f1c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,6 @@ AC_PREREQ([2.66])
 AC_INIT([bsdiff], [1.0.4], [patrick.mccarty@intel.com])
 AC_CONFIG_MACRO_DIR([m4])
 AC_PROG_CC
-AC_PROG_CC_STDC
 AC_LANG(C)
 AC_CONFIG_HEADERS([config.h])
 AC_PREFIX_DEFAULT(/usr/local)