diff --git a/sys/sys/sdt.h b/sys/sys/sdt.h
index 1d27b197760..fb5c3d67160 100644
--- a/sys/sys/sdt.h
+++ b/sys/sys/sdt.h
@@ -90,6 +90,7 @@ extern volatile bool sdt_probes_enabled;
 #define SDT_PROVIDER_DECLARE(prov)
 #define SDT_PROBE_DEFINE(prov, mod, func, name)
 #define SDT_PROBE_DECLARE(prov, mod, func, name)
+#define SDT_PROBES_ENABLED()	0
 #define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
 #define SDT_PROBE_ARGTYPE(prov, mod, func, name, num, type, xtype)