diff --git a/source/build/include/build.h b/source/build/include/build.h
index 28f1e5db1..ecb028128 100644
--- a/source/build/include/build.h
+++ b/source/build/include/build.h
@@ -866,6 +866,7 @@ static FORCE_INLINE void rotatesprite_win(int32_t sx, int32_t sy, int32_t z, int
 
 void   getzrange(const vec3_t *pos, int16_t sectnum, int32_t *ceilz, int32_t *ceilhit, int32_t *florz,
                  int32_t *florhit, int32_t walldist, uint32_t cliptype) ATTRIBUTE((nonnull(1,3,4,5,6)));
+extern vec2_t hitscangoal;
 int32_t   hitscan(const vec3_t *sv, int16_t sectnum, int32_t vx, int32_t vy, int32_t vz,
                   hitdata_t *hitinfo, uint32_t cliptype) ATTRIBUTE((nonnull(1,6)));
 void   neartag(int32_t xs, int32_t ys, int32_t zs, int16_t sectnum, int16_t ange,