diff --git a/src/r_things.c b/src/r_things.c
index ee929684..bc363392 100644
--- a/src/r_things.c
+++ b/src/r_things.c
@@ -47,6 +47,7 @@
 #include "z_zone.h"
 
 #define MINZ        (FRACUNIT*4)
+#define MAXZ        (FRACUNIT*8192)
 #define BASEYCENTER 100
 
 typedef struct {
@@ -539,7 +540,7 @@ void R_ProjectSprite (mobj_t* thing)
   tz = gxt-gyt;
 
   // thing is behind view plane?
-  if (tz < MINZ)
+  if (tz < MINZ || tz > MAXZ)
     return;
 
   xscale = FixedDiv(projection, tz);