diff --git a/Lib/ctypes/test/test_functions.py b/Lib/ctypes/test/test_functions.py
index 7562892420..e3c042eb7e 100644
--- a/Lib/ctypes/test/test_functions.py
+++ b/Lib/ctypes/test/test_functions.py
@@ -138,6 +138,18 @@ class FunctionTestCase(unittest.TestCase):
         self.assertEqual(result, -21)
         self.assertEqual(type(result), float)
 
+    def test_doubleresult_var(self):
+        f = dll._testfunc_d_bhilfd_var
+        f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_double]
+        f.restype = c_double
+        result = f(1, 2, 3, 4, 5.0, 6.0)
+        self.assertEqual(result, 21)
+        self.assertEqual(type(result), float)
+
+        result = f(-1, -2, -3, -4, -5.0, -6.0)
+        self.assertEqual(result, -21)
+        self.assertEqual(type(result), float)
+
     def test_longdoubleresult(self):
         f = dll._testfunc_D_bhilfD
         f.argtypes = [c_byte, c_short, c_int, c_long, c_float, c_longdouble]
diff --git a/Modules/_ctypes/_ctypes_test.c b/Modules/_ctypes/_ctypes_test.c
index 8fbc22ff29..18f499159c 100644
--- a/Modules/_ctypes/_ctypes_test.c
+++ b/Modules/_ctypes/_ctypes_test.c
@@ -341,6 +341,28 @@ EXPORT(double) _testfunc_d_bhilfd(signed char b, short h, int i, long l, float f
     return (double)(b + h + i + l + f + d);
 }
 
+EXPORT(double) _testfunc_d_bhilfd_var(int dummy, ...)
+{
+	signed char b;
+	short h;
+	int i;
+	long l;
+	float f;
+	double d;
+	va_list argptr;
+	va_start(argptr, dummy);
+	b = (signed char)va_arg(argptr, int);
+	h = (short)va_arg(argptr, int);
+	i = va_arg(argptr, int);
+	l = va_arg(argptr, long);
+	f = (float)va_arg(argptr, double);
+	d = va_arg(argptr, double);
+	va_end(argptr);
+        printf("_testfunc_d_bhilfd_var got %d %d %d %ld %f %f\n",
+               b, h, i, l, f, d);
+    return (double)(b + h + i + l + f + d);
+}
+
 EXPORT(long double) _testfunc_D_bhilfD(signed char b, short h, int i, long l, float f, long double d)
 {
 /*      printf("_testfunc_d_bhilfd got %d %d %d %ld %f %f\n",