diff --git a/src/p_mobj.h b/src/p_mobj.h
index 620028d81..56d9b6dae 100644
--- a/src/p_mobj.h
+++ b/src/p_mobj.h
@@ -445,7 +445,7 @@ boolean P_SupermanLook4Players(mobj_t *actor);
 void P_DestroyRobots(void);
 void P_SnowThinker(precipmobj_t *mobj);
 void P_RainThinker(precipmobj_t *mobj);
-FUNCMATH void P_NullPrecipThinker(precipmobj_t *mobj);
+void P_NullPrecipThinker(precipmobj_t *mobj);
 void P_RemovePrecipMobj(precipmobj_t *mobj);
 void P_SetScale(mobj_t *mobj, fixed_t newscale);
 void P_XYMovement(mobj_t *mo);