* Add support for USB Mass Storage Devices (BBB)
  (tested with USB memory sticks only)

* Avoid flicker on TRAB's VFD
diff --git a/drivers/sk98lin/skcsum.c b/drivers/sk98lin/skcsum.c
index 9630fad..0fd7030 100644
--- a/drivers/sk98lin/skcsum.c
+++ b/drivers/sk98lin/skcsum.c
@@ -70,6 +70,10 @@
  *
  ******************************************************************************/
 
+#include <config.h>
+
+#ifdef CONFIG_SK98
+
 #ifdef SK_USE_CSUM	/* Check if CSUM is to be used. */
 
 #ifndef lint
@@ -921,3 +925,5 @@
 }	/* SkCsEvent */
 
 #endif	/* SK_USE_CSUM */
+
+#endif /* CONFIG_SK98 */