diff --git a/build-aux/check-mescc.sh b/build-aux/check-mescc.sh
index 6221afa3..499d3230 100755
--- a/build-aux/check-mescc.sh
+++ b/build-aux/check-mescc.sh
@@ -189,6 +189,7 @@ lib/tests/scaffold/70-array-in-struct-init.c
 lib/tests/scaffold/70-struct-short-enum-init.c
 lib/tests/scaffold/70-struct-post.c
 lib/tests/scaffold/70-extern.c
+lib/tests/scaffold/70-ternary-arithmetic-argument.c
 lib/tests/setjmp/80-setjmp.c
 lib/tests/stdio/80-sscanf.c
 lib/tests/stdlib/80-qsort.c
@@ -238,6 +239,7 @@ lib/tests/scaffold/17-compare-unsigned-char-le.c
 lib/tests/scaffold/17-compare-unsigned-short-le.c
 lib/tests/scaffold/66-local-char-array.c
 lib/tests/scaffold/72-typedef-struct-def-local.c
+lib/tests/scaffold/70-ternary-arithmetic-argument.c
 lib/tests/mes/90-abtod.c
 lib/tests/mes/90-dtoab.c
 lib/tests/scaffold/90-goto-var.c
diff --git a/lib/tests/scaffold/70-ternary-arithmetic-argument.c b/lib/tests/scaffold/70-ternary-arithmetic-argument.c
new file mode 100644
index 00000000..3321621e
--- /dev/null
+++ b/lib/tests/scaffold/70-ternary-arithmetic-argument.c
@@ -0,0 +1,36 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+int
+func (unsigned i)
+{
+  if (i != 3959422974)
+    return 1;
+  return 0;
+}
+
+int
+main ()
+{
+  unsigned x = 184549374; // 0aff fffe
+  int flag = 0;
+  int r = func (x|(flag?0xe0000000:0xe1000000));
+  return r;
+}