diff --git a/base/services/w32time/register.c b/base/services/w32time/register.c
index 205a288bb04..bd9dca88bf5 100644
--- a/base/services/w32time/register.c
+++ b/base/services/w32time/register.c
@@ -6,6 +6,8 @@
  */
 
 #include "w32time.h"
+
+#define NDEBUG
 #include <debug.h>
 #include <strsafe.h>
 
diff --git a/base/services/w32time/w32time.c b/base/services/w32time/w32time.c
index 69c6bd15abe..72e1a8d47cf 100644
--- a/base/services/w32time/w32time.c
+++ b/base/services/w32time/w32time.c
@@ -7,6 +7,8 @@
  */
 
 #include "w32time.h"
+
+#define NDEBUG
 #include <debug.h>
 #include <strsafe.h>