-# if defined(__AVR_ATmega32U2__) && NKRO_IN_EPNUM > 4
-# error "Endpoints are not available enough to support all functions. Remove some in Makefile.(MOUSEKEY, EXTRAKEY, CONSOLE, NKRO)"
-# endif
+#else
+# define NKRO_IN_EPNUM CONSOLE_OUT_EPNUM
+#endif
+
+/* Check number of endpoints. ATmega32u2 has only four except for control endpoint. */
+#if defined(__AVR_ATmega32U2__) && NKRO_IN_EPNUM > 4
+# error "Endpoints are not available enough to support all functions. Disable some of build options in Makefile.(MOUSEKEY, EXTRAKEY, CONSOLE, NKRO)"