diff --git a/src/libraries/System.Private.CoreLib/src/System/Reflection/Emit/TypeNameBuilder.cs b/src/libraries/System.Private.CoreLib/src/System/Reflection/Emit/TypeNameBuilder.cs
index 2a797bae8dfcd..f025ee31e4bc8 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Reflection/Emit/TypeNameBuilder.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Reflection/Emit/TypeNameBuilder.cs
@@ -98,7 +98,7 @@ public void AddName(string name)
 
             _nestedName = true;
 
-            EscapeName(name!);
+            EscapeName(name);
         }
 
         public void AddPointer()