diff --git a/src/r_main.h b/src/r_main.h
index 2de6cc641..0f8781b19 100644
--- a/src/r_main.h
+++ b/src/r_main.h
@@ -28,9 +28,6 @@ extern fixed_t centerxfrac, centeryfrac;
 extern fixed_t projection, projectiony;
 extern fixed_t fovtan;
 
-// WARNING: a should be unsigned but to add with 2048, it isn't!
-#define AIMINGTODY(a) FixedDiv((FINETANGENT((2048+(((INT32)a)>>ANGLETOFINESHIFT)) & FINEMASK)*160), fovtan)
-
 extern size_t validcount, linecount, loopcount, framecount;
 
 //