diff --git a/debian/rules b/debian/rules
index 1d3bfb7f..a3ffcc5c 100644
--- a/debian/rules
+++ b/debian/rules
@@ -16,6 +16,7 @@ CPPFLAGS += -DHAVE_XMLRPCPP_SSL
 export USE_SPANDSP=yes LONG_DEBUG_MESSAGE=yes CPPFLAGS="$(CPPFLAGS)"
 
 export APP_NAME=ngcp-sems
+export SYSTEM_SAMPLECLOCK_RATE=48000LL
 
 %:
 	dh $@