Index: uspace/lib/c/include/stddef.h
===================================================================
--- uspace/lib/c/include/stddef.h	(revision 984a9ba2fa05c490a7066737655ed19130c714e8)
+++ uspace/lib/c/include/stddef.h	(revision ccf7a7e26a4b2ec8eef17440304266a7758723c9)
@@ -37,4 +37,5 @@
 
 #include <_bits/size_t.h>
+#include <_bits/ssize_t.h>
 #include <_bits/ptrdiff_t.h>
 #include <_bits/wchar_t.h>