diff --git a/configure.ac b/configure.ac
index 40e33ae..05a4d42 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,7 +16,7 @@ ACLOCAL="$ACLOCAL -I m4"
 AM_MAINTAINER_MODE
 
 AC_PROG_CC
-AM_PROG_CC_STDC
+AC_PROG_CC_STDC
 AC_ISC_POSIX
 AM_PROG_LEX
 AC_PROG_YACC