diff --git a/src/Nerdbank.GitVersioning.Tasks/AssemblyVersionInfo.cs b/src/Nerdbank.GitVersioning.Tasks/AssemblyVersionInfo.cs
index 42949b3b..193b25e6 100644
--- a/src/Nerdbank.GitVersioning.Tasks/AssemblyVersionInfo.cs
+++ b/src/Nerdbank.GitVersioning.Tasks/AssemblyVersionInfo.cs
@@ -463,7 +463,7 @@ internal override void DeclareAttribute(Type type, string arg)
 
             internal override void AddCommitDateProperty(long ticks)
             {
-                this.codeBuilder.AppendLine($"    static member internal GitCommitDate = new DateTimeOffset({ticks}L, TimeSpan.Zero)");
+                this.codeBuilder.AppendLine($"    static member internal GitCommitDate = new System.DateTimeOffset({ticks}L, System.TimeSpan.Zero)");
             }
 
             internal override void EndThisAssemblyClass()