diff --git a/Examples/test-suite/common.mk b/Examples/test-suite/common.mk
index b46c6b5d0..134c8ba64 100644
--- a/Examples/test-suite/common.mk
+++ b/Examples/test-suite/common.mk
@@ -267,6 +267,7 @@ C_TEST_CASES += \
 	preproc_3 \
 	preproc_4 \
 	preproc_5 \
+	preproc_6 \
 	ret_by_value \
 	sizeof_pointer \
 	sneaky1 \
diff --git a/Examples/test-suite/preproc_6.i b/Examples/test-suite/preproc_6.i
new file mode 100644
index 000000000..d24ce9a0f
--- /dev/null
+++ b/Examples/test-suite/preproc_6.i
@@ -0,0 +1,14 @@
+%module preproc_6
+ 
+#define add(a, b) (a + b)
+#define times(a, b) (a * b)
+#define op(x) x(1, 5)
+ 
+/* expand to (1 + 5) */
+%constant int a = op(add);
+/* expand to (1 * 5) */
+%constant int b = op(times);
+/* expand to ((1 + 5) * 5) */
+%constant int c = times(add(1, 5), 5);
+/* expand to ((1 + 5) * 5) */
+%constant int d = times(op(add), 5);