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-rw-r--r--osdep/semaphore.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/osdep/semaphore.h b/osdep/semaphore.h
index 832f059df4..cad2f7fb1f 100644
--- a/osdep/semaphore.h
+++ b/osdep/semaphore.h
@@ -1,6 +1,7 @@
#ifndef MP_SEMAPHORE_H_
#define MP_SEMAPHORE_H_
+#include <sys/types.h>
#include <semaphore.h>
// OSX provides non-working empty stubs, so we emulate them.