diff --git a/test/val/bug2357.c b/test/val/bug2357.c
new file mode 100644
index 000000000..a0cff0d19
--- /dev/null
+++ b/test/val/bug2357.c
@@ -0,0 +1,38 @@
+/* bug #2357 - Compiler produces invalid code after d8a3938
+*/
+
+unsigned long test;
+
+unsigned long longarray[7];
+
+void jsr_threebytes(void) {
+
+}
+
+/* having replaced two sty $zp with two sta $abs, but forgetting
+ * to update the instruction size, coptlong.c could cause a build
+ * error "Error: Range error (131 not in [-128..127])" if the
+ * computed codesize was under 126, but the real codesize was above
+ * 127.
+ * This tests verifies that the bug is fixed.
+ */
+unsigned char __fastcall__ foo (unsigned char res)
+{
+    if (res == 0) {
+      longarray[1]=test; /* 24 bytes  - but the compiler thought 22 */
+      longarray[2]=test; /* 48 bytes  - but 44 */
+      longarray[3]=test; /* 72 bytes  - 66 */
+      longarray[4]=test; /* 96 bytes  - 88 */
+      longarray[6]=test; /* 120 bytes - 110 */
+      jsr_threebytes();  /* 123       - 113 */
+      jsr_threebytes();  /* 126       - 116 */
+      jsr_threebytes();  /* 129       - 119 */
+    }
+    return 0;
+}
+
+int main (void)
+{
+    foo(42);
+    return 0;
+}