diff --git a/src/archive/plugins/Iso9660ArchivePlugin.cxx b/src/archive/plugins/Iso9660ArchivePlugin.cxx
index be319d2a7..2f463364f 100644
--- a/src/archive/plugins/Iso9660ArchivePlugin.cxx
+++ b/src/archive/plugins/Iso9660ArchivePlugin.cxx
@@ -38,8 +38,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-#define CEILING(x, y) ((x+(y-1))/y)
-
 struct Iso9660 {
 	iso9660_t *const iso;