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-rw-r--r--include/sys/sem.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/sys/sem.h b/include/sys/sem.h
index add3f1c8..cc3a3e63 100644
--- a/include/sys/sem.h
+++ b/include/sys/sem.h
@@ -4,6 +4,8 @@
extern "C" {
#endif
+#include <features.h>
+
#define __NEED_size_t
#define __NEED_pid_t
#define __NEED_time_t