diff --git a/libisofs/rockridge.h b/libisofs/rockridge.h
index 4a78323..2b1677f 100644
--- a/libisofs/rockridge.h
+++ b/libisofs/rockridge.h
@@ -42,9 +42,7 @@
 #include "ecma119.h"
 
 /* For ssize_t */
-#ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
-#endif
 #include <unistd.h>