diff --git a/libsrc/geos-common/graph/bitotherclip.s b/libsrc/geos-common/graph/bitotherclip.s
index 020139da8..fba00d966 100644
--- a/libsrc/geos-common/graph/bitotherclip.s
+++ b/libsrc/geos-common/graph/bitotherclip.s
@@ -6,7 +6,7 @@
 ; void BitOtherClip     (void *proc1, void* proc2, char skipl, char skipr, int skipy,
 ;                               struct iconpic *myGfx);
 
-; both proc1, proc2 should be: char __fastcall something (void);
+; both proc1, proc2 should be: char foo (void);
 ;       proc1 is called before reading a byte (.A returns next data)
 ;       proc2 is called before reading each byte which is not pattern (code >219)