diff --git a/src/libraries/System.Speech/src/ILLink/ILLink.Suppressions.xml b/src/libraries/System.Speech/src/ILLink/ILLink.Suppressions.xml
new file mode 100644
index 00000000000000..bc147488fe9137
--- /dev/null
+++ b/src/libraries/System.Speech/src/ILLink/ILLink.Suppressions.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<linker>
+  <assembly fullname="System.Speech, Version=6.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51">
+    <attribute fullname="System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute">
+      <argument>ILLink</argument>
+      <argument>IL2026</argument>
+      <property name="Scope">member</property>
+      <property name="Target">M:System.Speech.Internal.SrgsCompiler.AppDomainGrammarProxy.GetTypeForRule(System.Reflection.Assembly,System.String)</property>
+    </attribute>
+  </assembly>
+</linker>
diff --git a/src/libraries/System.Speech/src/System.Speech.csproj b/src/libraries/System.Speech/src/System.Speech.csproj
index 783e89d8b0e4bd..65fdc149b9fe22 100644
--- a/src/libraries/System.Speech/src/System.Speech.csproj
+++ b/src/libraries/System.Speech/src/System.Speech.csproj
@@ -6,7 +6,6 @@
     <!-- SA1129: https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3277 -->
     <NoWarn>$(NoWarn);CS0649;SA1129;CA1847</NoWarn>
     <Nullable>annotations</Nullable>
-    <SetIsTrimmable>false</SetIsTrimmable>
     <IsPackable>true</IsPackable>
     <AddNETFrameworkPlaceholderFileToPackage>true</AddNETFrameworkPlaceholderFileToPackage>
     <AddNETFrameworkAssemblyReferenceToPackage>true</AddNETFrameworkAssemblyReferenceToPackage>
diff --git a/src/libraries/illink-oob.targets b/src/libraries/illink-oob.targets
index 72cecaf3b8beec..963dee93502f46 100644
--- a/src/libraries/illink-oob.targets
+++ b/src/libraries/illink-oob.targets
@@ -22,7 +22,6 @@
       <_OOBsToIgnore Include="System.Composition.Runtime" />
       <_OOBsToIgnore Include="System.Composition.TypedParts" />
       <_OOBsToIgnore Include="System.Configuration.ConfigurationManager" />
-      <_OOBsToIgnore Include="System.Speech" />
 
       <_NetCoreAppRuntimeAssemblies Include="$(NetCoreAppCurrentRuntimePath)*.dll" Exclude="$(NetCoreAppCurrentRuntimePath)*.Generator.dll;$(NetCoreAppCurrentRuntimePath)*.Native.dll;$(NetCoreAppCurrentRuntimePath)*msquic.dll" />
       <_RuntimePackTrimmedAssemblies Include="$(MicrosoftNetCoreAppRuntimePackRidLibTfmDir)*.dll" />