diff --git a/src/xrt/state_trackers/prober/p_prober.c b/src/xrt/state_trackers/prober/p_prober.c
index 50d8ad067..d8ad43b80 100644
--- a/src/xrt/state_trackers/prober/p_prober.c
+++ b/src/xrt/state_trackers/prober/p_prober.c
@@ -79,7 +79,7 @@ teardown_devices(struct prober *p);
 static void
 teardown(struct prober *p);
 
-static int
+static xrt_result_t
 p_probe(struct xrt_prober *xp);
 
 static xrt_result_t