diff --git a/src/xrt/auxiliary/os/os_time.h b/src/xrt/auxiliary/os/os_time.h
index b502cbbf3..45e821486 100644
--- a/src/xrt/auxiliary/os/os_time.h
+++ b/src/xrt/auxiliary/os/os_time.h
@@ -69,7 +69,7 @@ extern "C" {
  * @ingroup aux_os_time
  */
 static inline void
-os_nanosleep(int32_t nsec)
+os_nanosleep(int64_t nsec)
 {
 #if defined(XRT_OS_LINUX)
 	struct timespec spec;