diff --git a/configure.ac b/configure.ac
index 66e3233..ca4bc6f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,6 +11,7 @@ dnl checks for programs
 AC_PROG_MAKE_SET
 AC_PROG_CC
 AC_PROG_INSTALL
+AM_PROG_CC_C_O
 LT_INIT
 AC_PROG_LIBTOOL