diff --git a/bsp/abstract-machine/include/asm/errno.h b/bsp/abstract-machine/include/asm/errno.h
new file mode 100644
index 0000000..4c82b50
--- /dev/null
+++ b/bsp/abstract-machine/include/asm/errno.h
@@ -0,0 +1 @@
+#include <asm-generic/errno.h>
diff --git a/bsp/abstract-machine/include/extra.h b/bsp/abstract-machine/include/extra.h
index 8c1cfe0..7bfc034 100644
--- a/bsp/abstract-machine/include/extra.h
+++ b/bsp/abstract-machine/include/extra.h
@@ -1,3 +1,3 @@
-typedef long ssize_t;
 typedef long suseconds_t;
 typedef unsigned long useconds_t;
+#include <sys/types.h>