diff --git a/drivers/isdn/eicon/Divas_mod.c b/drivers/isdn/eicon/Divas_mod.c
index 75225568..8cb2a040 100644
--- a/drivers/isdn/eicon/Divas_mod.c
+++ b/drivers/isdn/eicon/Divas_mod.c
@@ -25,6 +25,7 @@
  */
 
 
+#include <linux/config.h>
 #include <linux/fs.h>
 #undef N_DATA