diff --git a/test/val/bug1933.c b/test/val/bug1933.c
new file mode 100644
index 000000000..9302f565a
--- /dev/null
+++ b/test/val/bug1933.c
@@ -0,0 +1,9 @@
+
+/* bug #1933 - wrong printf specifier breaks data lines */
+
+unsigned char info_signature[3] = {3, 21, 63 | 0x80};
+
+int main(void)
+{
+    return 0;
+}
\ No newline at end of file