diff --git a/src/tools/fixup_tos_boot_checksum/Jamfile b/src/tools/fixup_tos_boot_checksum/Jamfile
index 34933f1af3..3241e28ddd 100644
--- a/src/tools/fixup_tos_boot_checksum/Jamfile
+++ b/src/tools/fixup_tos_boot_checksum/Jamfile
@@ -1,8 +1,5 @@
 SubDir HAIKU_TOP src tools fixup_tos_boot_checksum ;
 
-# avoid #includeing other stuff in the source
-#SubDirCcFlags -Dbfd_byte=char -DSYMNMLEN=8 ;
-
 BuildPlatformMain <build>fixup_tos_boot_checksum
 	: fixup_tos_boot_checksum.c
 	: