diff --git a/user/tests/unit/stubs/system_mode.cpp b/user/tests/unit/stubs/system_mode.cpp
index 87db3f7942..5cb7bab99d 100644
--- a/user/tests/unit/stubs/system_mode.cpp
+++ b/user/tests/unit/stubs/system_mode.cpp
@@ -2,3 +2,7 @@
 
 void set_system_mode(System_Mode_TypeDef mode) {
 }
+
+void system_thread_set_state(spark::feature::State state, void*)
+{
+}