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-rw-r--r--libusb/io.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libusb/io.c b/libusb/io.c
index ef2b7c4..8ac9793 100644
--- a/libusb/io.c
+++ b/libusb/io.c
@@ -31,6 +31,7 @@
#include <sys/time.h>
#endif
#ifdef USBI_TIMERFD_AVAILABLE
+#include <unistd.h>
#include <sys/timerfd.h>
#endif