diff --git a/SDL3-CS/SDL3-CS.csproj b/SDL3-CS/SDL3-CS.csproj
index b3ef941..4f627a6 100644
--- a/SDL3-CS/SDL3-CS.csproj
+++ b/SDL3-CS/SDL3-CS.csproj
@@ -7,6 +7,7 @@
     <Nullable>enable</Nullable>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <NoWarn>$(NoWarn);SYSLIB1054;CA1401</NoWarn>
+    <DefineConstants>$(DefineConstants);JETBRAINS_ANNOTATIONS</DefineConstants>
   </PropertyGroup>
 
   <PropertyGroup Label="NuGet">