diff --git a/win32_functional_tests/chconf.h b/win32_functional_tests/chconf.h
index a96eeea1cb..be1cee9d80 100644
--- a/win32_functional_tests/chconf.h
+++ b/win32_functional_tests/chconf.h
@@ -30,6 +30,10 @@
 
 #define CHPRINTF_USE_FLOAT          TRUE
 
+  #define ON_LOCK_HOOK
+  #define ON_UNLOCK_HOOK
+
+
 /*===========================================================================*/
 /**
  * @name Kernel parameters and options