diff --git a/client/makefile_sim b/client/makefile_sim
index d3283c285c..b7ad1fa60a 100644
--- a/client/makefile_sim
+++ b/client/makefile_sim
@@ -23,6 +23,7 @@ OBJS = \
     cs_prefs.o \
     cs_proxy.o \
     cs_scheduler.o \
+    cs_sporadic.o \
     cs_statefile.o \
     cs_trickle.o \
 	current_version.o \