diff --git a/idapython.vcxproj b/idapython.vcxproj
index 2792f5d..9393c48 100644
--- a/idapython.vcxproj
+++ b/idapython.vcxproj
@@ -223,6 +223,7 @@
Cdecl
4102;4005;4804;4018;4800;%(DisableSpecificWarnings)
true
+
NDEBUG;%(PreprocessorDefinitions)
0x0419