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-rw-r--r--posix/sys/types.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/posix/sys/types.h b/posix/sys/types.h
index be37340025..7a0b3828c3 100644
--- a/posix/sys/types.h
+++ b/posix/sys/types.h
@@ -121,6 +121,10 @@ typedef __key_t key_t;
 #include <time.h>
 
 #ifdef __USE_XOPEN
+# ifndef __useconds_t_defined
+typedef __useconds_t useconds_t;
+#  define __useconds_t_defined
+# endif
 typedef __suseconds_t suseconds_t;
 #endif