--- a/src/gmp/acinclude.m4
+++ b/src/gmp/acinclude.m4
@@ -3768,7 +3768,7 @@
                gmp_cv_c_for_build_ansi,
 [cat >conftest.c <<EOF
 int
-main (int argc, char *argv[])
+main (int argc, char **argv)
 {
   exit(0);
 }