diff --git a/debian/arch/mipsel/config.r5k-cobalt b/debian/arch/mipsel/config.r5k-cobalt
index 968236ab8..ddb8ffb67 100644
--- a/debian/arch/mipsel/config.r5k-cobalt
+++ b/debian/arch/mipsel/config.r5k-cobalt
@@ -872,7 +872,47 @@ CONFIG_NET_POLL_CONTROLLER=y
 #
 # ISDN subsystem
 #
-# CONFIG_ISDN is not set
+CONFIG_ISDN=m
+
+#
+# Old ISDN4Linux
+#
+# CONFIG_ISDN_I4L is not set
+
+#
+# CAPI subsystem
+#
+CONFIG_ISDN_CAPI=m
+CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON=y
+CONFIG_ISDN_CAPI_MIDDLEWARE=y
+CONFIG_ISDN_CAPI_CAPI20=m
+CONFIG_ISDN_CAPI_CAPIFS_BOOL=y
+CONFIG_ISDN_CAPI_CAPIFS=m
+
+#
+# CAPI hardware drivers
+#
+
+#
+# Active AVM cards
+#
+CONFIG_CAPI_AVM=y
+CONFIG_ISDN_DRV_AVMB1_B1PCI=m
+CONFIG_ISDN_DRV_AVMB1_B1PCIV4=y
+CONFIG_ISDN_DRV_AVMB1_B1PCMCIA=m
+CONFIG_ISDN_DRV_AVMB1_T1PCI=m
+CONFIG_ISDN_DRV_AVMB1_C4=m
+
+#
+# Active Eicon DIVA Server cards
+#
+CONFIG_CAPI_EICON=y
+CONFIG_ISDN_DIVAS=m
+CONFIG_ISDN_DIVAS_BRIPCI=y
+CONFIG_ISDN_DIVAS_PRIPCI=y
+CONFIG_ISDN_DIVAS_DIVACAPI=m
+CONFIG_ISDN_DIVAS_USERIDI=m
+CONFIG_ISDN_DIVAS_MAINT=m
 
 #
 # Telephony Support
diff --git a/debian/changelog b/debian/changelog
index 8781ee270..c8150db10 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,6 +4,7 @@ linux-2.6 (2.6.17+2.6.18-rc6-0experimental.2) UNRELEASED; urgency=low
   * Bump build-dependency on kernel-package to 10.054.
   * arm/iop32x: Build ext2/3 as modules.
   * arm/iop32x: Disable CONFIG_EMBEDDED.
+  * mipsel/r5k-cobalt: Enable ISDN.
 
   [ Sven Luther ]
   * [powerpc] Enabled the -prep flavour.