diff --git a/src/libraries/System.Private.CoreLib/src/ILLink/ILLink.Substitutions.Shared.xml b/src/libraries/System.Private.CoreLib/src/ILLink/ILLink.Substitutions.Shared.xml
index 522cea0c61ca2..ba59103a5b5e5 100644
--- a/src/libraries/System.Private.CoreLib/src/ILLink/ILLink.Substitutions.Shared.xml
+++ b/src/libraries/System.Private.CoreLib/src/ILLink/ILLink.Substitutions.Shared.xml
@@ -4,7 +4,7 @@
       <method signature="System.Boolean get_Invariant()" body="stub" value="true" feature="System.Globalization.Invariant" featurevalue="true" />
     </type>
     <type fullname="System.LocalAppContextSwitches">
-      <method signature="System.Boolean get_EnableUnsafeUTF7Encoding()" body="stub" value="true" feature="System.Text.Encoding.EnableUnsafeUTF7Encoding" featurevalue="true" />
+      <method signature="System.Boolean get_EnableUnsafeUTF7Encoding()" body="stub" value="false" feature="System.Text.Encoding.EnableUnsafeUTF7Encoding" featurevalue="false" />
     </type>
   </assembly>
 </linker>