diff --git a/Source/Tools/Flax.Build/Build/DotNet/DotNetSdk.cs b/Source/Tools/Flax.Build/Build/DotNet/DotNetSdk.cs
index 7d4866bf8..939b94fe2 100644
--- a/Source/Tools/Flax.Build/Build/DotNet/DotNetSdk.cs
+++ b/Source/Tools/Flax.Build/Build/DotNet/DotNetSdk.cs
@@ -282,7 +282,7 @@ namespace Flax.Build
 
             var dotnetSdkVersion = GetVersion(dotnetSdkVersions);
             var dotnetRuntimeVersion = GetVersion(dotnetRuntimeVersions);
-            if (!string.IsNullOrEmpty(dotnetRuntimeVersion) && ParseVersion(dotnetRuntimeVersion).Major > ParseVersion(dotnetSdkVersion).Major)
+            if (!string.IsNullOrEmpty(dotnetSdkVersion) && !string.IsNullOrEmpty(dotnetRuntimeVersion) && ParseVersion(dotnetRuntimeVersion).Major > ParseVersion(dotnetSdkVersion).Major)
             {
                 // Make sure the reference assemblies are not newer than the SDK itself
                 var dotnetRuntimeVersionsRemaining = dotnetRuntimeVersions;