diff --git a/package/network/config/ltq-adsl-app/files/dsl_control b/package/network/config/ltq-adsl-app/files/dsl_control
index fef0834b12..cece347b85 100644
--- a/package/network/config/ltq-adsl-app/files/dsl_control
+++ b/package/network/config/ltq-adsl-app/files/dsl_control
@@ -10,7 +10,7 @@ EXTRA_HELP="	status  Get DSL status information
 SERVICE_DAEMONIZE=1
 SERVICE_WRITE_PID=1
 
-. /lib/functions/lantiq_dsl.sh
+[ -f /lib/functions/lantiq_dsl.sh ] && . /lib/functions/lantiq_dsl.sh
 
 annex_b=10_00_10_00_00_04_00_00
 annex_bdmt=10_00_00_00_00_00_00_00
diff --git a/package/network/config/ltq-vdsl-app/files/dsl_control b/package/network/config/ltq-vdsl-app/files/dsl_control
index 7c423114cb..4bfea97031 100644
--- a/package/network/config/ltq-vdsl-app/files/dsl_control
+++ b/package/network/config/ltq-vdsl-app/files/dsl_control
@@ -11,7 +11,7 @@ EXTRA_HELP="	status  Get DSL status information
 SERVICE_DAEMONIZE=1
 SERVICE_WRITE_PID=1
 
-. /lib/functions/lantiq_dsl.sh
+[ -f /lib/functions/lantiq_dsl.sh ] && . /lib/functions/lantiq_dsl.sh
 XDSL_CTRL=vdsl_cpe_control
 
 # G.992.1 Annex A