Index: uspace/lib/c/include/smc.h
===================================================================
--- uspace/lib/c/include/smc.h	(revision fec7ba0dc652cc9b10575bcf70be9f369491905c)
+++ uspace/lib/c/include/smc.h	(revision 7dcce0ad7edb3052cbbdd24788a4fe736ed43414)
@@ -36,4 +36,5 @@
 #define LIBC_SMC_H_
 
+#include <errno.h>
 #include <stddef.h>