diff --git a/test/err/pr1189.c b/test/err/pr1189.c
new file mode 100644
index 000000000..af1d237f1
--- /dev/null
+++ b/test/err/pr1189.c
@@ -0,0 +1,12 @@
+/* pr #1189 - Fixed compiler CHECK failure when calling functions defined with duplicate param names */
+
+void f(int a, int a)
+{
+
+}
+
+int main(void)
+{
+    f(0, 1); /* Check failed: (Param->Flags & SC_PARAM) != 0 */
+    return 0;
+}