diff --git a/src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems b/src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems
index 1b32a55a27fba..93c774f5c5777 100644
--- a/src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems
+++ b/src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems
@@ -28,11 +28,11 @@
   </PropertyGroup>
   <ItemGroup>
     <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.Shared.xml" />
-    <!-- TODO: Enable these substitutions files for more platforms once https://github.com/mono/linker/issues/1260 is fixed -->
-    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.LittleEndian.xml" Condition="'$(Platform)' == 'wasm'" />
-    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.32bit.xml" Condition="'$(Platform)' == 'wasm'" />
-    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.NoArmIntrinsics.xml" Condition="'$(Platform)' == 'wasm'" />
-    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.NoX86Intrinsics.xml" Condition="'$(Platform)' == 'wasm'" />
+    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.LittleEndian.xml" Condition="'$(Platform)' == 'wasm' or '$(Platform)' == 'arm' or '$(Platform)' == 'arm64' or '$(Platform)' == 'x86' or '$(Platform)' == 'x64'" />
+    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.32bit.xml" Condition="'$(Platform)' == 'wasm' or '$(Platform)' == 'arm' or '$(Platform)' == 'x86'" />
+    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.64bit.xml" Condition="'$(Platform)' == 'arm64' or '$(Platform)' == 'x64'" />
+    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.NoArmIntrinsics.xml" Condition="'$(Platform)' == 'wasm' or '$(Platform)' == 'x86' or '$(Platform)' == 'x64'" />
+    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.NoX86Intrinsics.xml" Condition="'$(Platform)' == 'wasm' or '$(Platform)' == 'arm' or '$(Platform)' == 'arm64'" />
     <ILLinkLinkAttributesXmls Include="$(ILLinkSharedDirectory)ILLink.LinkAttributes.Shared.xml" />
   </ItemGroup>
   <ItemGroup>