diff --git a/src/xrt/state_trackers/prober/p_prober.c b/src/xrt/state_trackers/prober/p_prober.c
index cbc1f9975..3f070e408 100644
--- a/src/xrt/state_trackers/prober/p_prober.c
+++ b/src/xrt/state_trackers/prober/p_prober.c
@@ -853,9 +853,9 @@ print_system_devices(u_pp_delegate_t dg, struct xrt_system_devices *xsysd)
 	u_pp(dg, "\n\tIn roles:");
 
 #define PH(IDENT)                                                                                                      \
-	u_pp(dg, "\n\t\t%s: %s, view count: %d", #IDENT,                                                               \
+	u_pp(dg, "\n\t\t%s: %s, view count: %lu", #IDENT,                                                              \
 	     xsysd->static_roles.IDENT ? xsysd->static_roles.IDENT->str : "<none>",                                    \
-	     xsysd->static_roles.IDENT ? xsysd->static_roles.IDENT->hmd->view_count : "<none>")
+	     xsysd->static_roles.IDENT ? xsysd->static_roles.IDENT->hmd->view_count : 0)
 #define P(IDENT) u_pp(dg, "\n\t\t%s: %s", #IDENT, xsysd->static_roles.IDENT ? xsysd->static_roles.IDENT->str : "<none>")
 #define PD(IDENT) u_pp(dg, "\n\t\t%s: %s", #IDENT, roles.IDENT >= 0 ? xsysd->xdevs[roles.IDENT]->str : "<none>")