diff --git a/quicknes/libquicknes/libquicknes.vcxproj b/quicknes/libquicknes/libquicknes.vcxproj
index 5ac37479d7..f8674fea98 100644
--- a/quicknes/libquicknes/libquicknes.vcxproj
+++ b/quicknes/libquicknes/libquicknes.vcxproj
@@ -143,7 +143,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <DisableSpecificWarnings>4244;4800;4804;4996</DisableSpecificWarnings>
       <AdditionalIncludeDirectories>$(ProjectDir)\..</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_WINDLL;%(PreprocessorDefinitions);DISABLE_AUTO_FILE;__LIBRETRO__</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_WINDLL;%(PreprocessorDefinitions);DISABLE_AUTO_FILE;__LIBRETRO__;NDEBUG</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <GenerateDebugInformation>true</GenerateDebugInformation>