diff --git a/src/or/circuitbuild.c b/src/or/circuitbuild.c
index edf7d2863ea63b6fa6dbc1c7e5dfad38e3cd205a..7a23fbaa7959b54d3f82f0edcf153d26f312f839 100644
--- a/src/or/circuitbuild.c
+++ b/src/or/circuitbuild.c
@@ -14,6 +14,7 @@
 #include "or.h"
 #include "channel.h"
 #include "circpathbias.h"
+#define CIRCUITBUILD_PRIVATE
 #include "circuitbuild.h"
 #include "circuitlist.h"
 #include "circuitstats.h"