diff --git a/tools/builder_defaults.sh b/tools/builder_defaults.sh
index 8a60f5d831..780e395edd 100644
--- a/tools/builder_defaults.sh
+++ b/tools/builder_defaults.sh
@@ -135,7 +135,7 @@ export KERNEL_BUILD_PATH=${KERNEL_BUILD_PATH:-"${SCRATCHDIR}/kernels"}
 # Do not touch builder /usr/obj
 export MAKEOBJDIRPREFIX=${MAKEOBJDIRPREFIX:-"${SCRATCHDIR}/obj"}
 
-export MODULES_OVERRIDE=${MODULES_OVERRIDE:-"aesni amdtemp coretemp cryptodev cpuctl dummynet hwpmc i2c ifdescfs if_stf ipdivert ipfw ipmi ix ixv ndis nmdm opensolaris sfxge vmm zfs"}
+export MODULES_OVERRIDE=${MODULES_OVERRIDE:-"aesni amdtemp coretemp cryptodev cpuctl descfs dummynet hwpmc i2c if_stf ipdivert ipfw ipmi ix ixv ndis nmdm opensolaris sfxge vmm zfs"}
 
 # gnid
 export GNID_REPO_BASE=${GNID_REPO_BASE:-"${GIT_REPO_BASE}/gnid.git"}