diff --git a/package/kernel/modules/netsupport.mk b/package/kernel/modules/netsupport.mk
index 73c8b0252e..2bb14e2222 100644
--- a/package/kernel/modules/netsupport.mk
+++ b/package/kernel/modules/netsupport.mk
@@ -88,7 +88,7 @@ define KernelPackage/misdn
   	CONFIG_MISDN \
 	CONFIG_MISDN_DSP \
 	CONFIG_MISDN_L1OIP \
-	CONFIG_ISDN_PPP=N \
+	CONFIG_ISDN_PPP=n \
 	CONFIG_ISDN_AUDIO=n \
 	CONFIG_ISDN_WITH_ABC=n \
 	CONFIG_ISDN_DRV_LOOP=n \