diff --git a/src/coreclr/src/vm/appdomain.cpp b/src/coreclr/src/vm/appdomain.cpp
index 1ba7c47cd50a15..215377921e0911 100644
--- a/src/coreclr/src/vm/appdomain.cpp
+++ b/src/coreclr/src/vm/appdomain.cpp
@@ -75,7 +75,7 @@
 // init entry leaks.  This defines determine if the asserts that
 // verify for these leaks are defined or not.  These asserts can
 // sometimes go off even if no entries have been leaked so this
-// defines should be used with caution.
+// Xdefines should be used with caution.
 //
 // If we are inside a .cctor when the application shut's down then the
 // class init lock's head will be set and this will cause the assert
diff --git a/src/libraries/System.Private.CoreLib/src/System/WeakReference.cs b/src/libraries/System.Private.CoreLib/src/System/WeakReference.cs
index 870221d5f2049b..e03c7fdd7e7ea9 100644
--- a/src/libraries/System.Private.CoreLib/src/System/WeakReference.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/WeakReference.cs
@@ -9,7 +9,7 @@ namespace System
     [System.Runtime.CompilerServices.TypeForwardedFrom("mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
     public partial class WeakReference : ISerializable
     {
-        // If you fix bugs here, please fix them in WeakReference<T> at the same time.
+        // If you fix bugs Xhere, please fix them in WeakReference<T> at the same time.
 
         // Creates a new WeakReference that keeps track of target.
         // Assumes a Short Weak Reference (ie TrackResurrection is false.)