diff --git a/libs/models/testclip.c b/libs/models/testclip.c
index 0e19c7c40..4ad8d934a 100644
--- a/libs/models/testclip.c
+++ b/libs/models/testclip.c
@@ -5,6 +5,7 @@
 
 #undef DIST_EPSILON
 #define DIST_EPSILON 0
+#define ENABLE_BOXCLIP
 #include "trace.c"
 
 dclipnode_t clipnodes1[] = {
diff --git a/libs/models/trace.c b/libs/models/trace.c
index 5642f463a..25aaf3e01 100644
--- a/libs/models/trace.c
+++ b/libs/models/trace.c
@@ -83,7 +83,7 @@ calc_impact (trace_t *trace, const vec3_t start, const vec3_t end,
 	VectorSubtract (end, start, dist);
 	VectorMultAdd (start, frac, dist, trace->endpos);
 }
-#if 0
+#ifdef ENABLE_BOXCLIP
 typedef struct {
 	mplane_t    *plane;
 	int          side;