diff --git a/libsrc/geos/file/renamefile.s b/libsrc/geos/file/renamefile.s
index 24834603e..709e10f7b 100644
--- a/libsrc/geos/file/renamefile.s
+++ b/libsrc/geos/file/renamefile.s
@@ -4,7 +4,7 @@
 ;
 ; 25.12.1999, 2.1.2003
 
-; char RenameFile  (char *source, char *target);
+; char RenameFile  (char *old, char *new);
 
 	    .export _RenameFile
 	    .import popax, setoserror