diff --git a/autobuild.xml b/autobuild.xml
index 9be112524b..beabf2fd06 100644
--- a/autobuild.xml
+++ b/autobuild.xml
@@ -1603,11 +1603,11 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>3bf88febd23656327a4ee2a3ebe99cae4b15573e</string>
+              <string>3d173e176e9777f1b10f54fe0bd1c735a65b56e5</string>
               <key>hash_algorithm</key>
               <string>sha1</string>
               <key>url</key>
-              <string>https://github.com/secondlife/3p-meshoptimizer/releases/download/v160-032f20a/meshoptimizer-160-darwin64-032f20a.tar.zst</string>
+              <string>https://github.com/secondlife/3p-meshoptimizer/releases/download/v210-r1/meshoptimizer-210-darwin64-9846246058.tar.zst</string>
             </map>
             <key>name</key>
             <string>darwin64</string>
@@ -1617,15 +1617,29 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>13c0a33d9c49cc07b354527c7ef992d33f854c59</string>
+              <string>6777467d1d06064351c27f70d556fdcba8420c52</string>
               <key>hash_algorithm</key>
               <string>sha1</string>
               <key>url</key>
-              <string>https://github.com/secondlife/3p-meshoptimizer/releases/download/v160-032f20a/meshoptimizer-160-windows64-032f20a.tar.zst</string>
+              <string>https://github.com/secondlife/3p-meshoptimizer/releases/download/v210-r1/meshoptimizer-210-windows64-9846246058.tar.zst</string>
             </map>
             <key>name</key>
             <string>windows64</string>
           </map>
+          <key>linux64</key>
+          <map>
+            <key>archive</key>
+            <map>
+              <key>hash</key>
+              <string>17eb4a03f94d363e9ad8b096ac590e0649cf91fa</string>
+              <key>hash_algorithm</key>
+              <string>sha1</string>
+              <key>url</key>
+              <string>https://github.com/secondlife/3p-meshoptimizer/releases/download/v210-r1/meshoptimizer-210-linux64-9846246058.tar.zst</string>
+            </map>
+            <key>name</key>
+            <string>linux64</string>
+          </map>
         </map>
         <key>license</key>
         <string>meshoptimizer</string>
@@ -1634,7 +1648,7 @@
         <key>copyright</key>
         <string>Copyright (c) 2016-2021 Arseny Kapoulkine</string>
         <key>version</key>
-        <string>160</string>
+        <string>210</string>
         <key>name</key>
         <string>meshoptimizer</string>
         <key>canonical_repo</key>
diff --git a/indra/llmeshoptimizer/llmeshoptimizer.cpp b/indra/llmeshoptimizer/llmeshoptimizer.cpp
index 52ed9b9526..7339454367 100644
--- a/indra/llmeshoptimizer/llmeshoptimizer.cpp
+++ b/indra/llmeshoptimizer/llmeshoptimizer.cpp
@@ -291,6 +291,7 @@ U64 LLMeshOptimizer::simplifyU32(U32 *destination,
             vertex_positions_stride,
             target_index_count,
             target_error,
+            0,
             result_error
             );
     }
@@ -332,6 +333,7 @@ U64 LLMeshOptimizer::simplify(U16 *destination,
             vertex_positions_stride,
             target_index_count,
             target_error,
+            0,
             result_error
             );
     }