diff --git a/basics/include/sys/types.h b/basics/include/sys/types.h
index 0241800..0d03c5c 100644
--- a/basics/include/sys/types.h
+++ b/basics/include/sys/types.h
@@ -14,4 +14,11 @@ typedef long long off_t;
 /* This is defined to be the same size as size_t. */
 typedef long ssize_t;
 
+/* Define this to be 64-bit as its main use is in struct timeval where the
+   extra space would otherwise be padding. */
+typedef long long suseconds_t;
+
+/* Follow x32 in defining this as 64-bit. */
+typedef long long nlink_t;
+
 #endif