diff --git a/sysdeps/standalone/arm/bits/errno.h b/sysdeps/standalone/arm/bits/errno.h
index 391f92548f..373d701bc3 100644
--- a/sysdeps/standalone/arm/bits/errno.h
+++ b/sysdeps/standalone/arm/bits/errno.h
@@ -56,6 +56,7 @@
 # define EIO		28
 # define ENOSPC		29
 # define EEXIST		30
+# define EBUSY		31
 #endif
 
 #define __set_errno(val) errno = (val)