diff --git a/panda/src/testbed/Sources.pp b/panda/src/testbed/Sources.pp
index b7474d67da..fc0d0e88ce 100644
--- a/panda/src/testbed/Sources.pp
+++ b/panda/src/testbed/Sources.pp
@@ -156,5 +156,5 @@
   #define SOURCES \
     deadrec_send.cxx
 
-  #define LOCAL_LIBS $[LOCAL_LIBS] net
+  #define LOCAL_LIBS $[LOCAL_LIBS] net lerp
 #end test_bin_target