diff --git a/aclocal.m4 b/aclocal.m4
index 1af2dd5d..21d53743 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -60,7 +60,7 @@ AC_DEFUN(PA_HAVE_FUNC,
 [AC_MSG_CHECKING([for $1])
  AC_LINK_IFELSE([AC_LANG_SOURCE([
 AC_INCLUDES_DEFAULT
-int main(void) {
+int main(int argc, char *argv[]) {
     (void)$1$2;
     return 0;
 }