diff --git a/configure.ac b/configure.ac
index cfee2a6..566effa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,7 +12,6 @@ AC_CONFIG_HEADERS([config.h])
 
 AC_ISC_POSIX
 AC_PROG_CC
-AM_PROG_CC_STDC
 AC_HEADER_STDC
 AC_C_CONST