diff --git a/io/io.cppproj b/io/io.cppproj
index b278241..3d47a19 100644
--- a/io/io.cppproj
+++ b/io/io.cppproj
@@ -15,7 +15,7 @@
     <AssemblyName>io</AssemblyName>
     <Name>io</Name>
     <RootNamespace>io</RootNamespace>
-    <ToolchainFlavour>Native</ToolchainFlavour>
+    <ToolchainFlavour>avr-g++-9.1.0</ToolchainFlavour>
     <KeepTimersRunning>true</KeepTimersRunning>
     <OverrideVtor>false</OverrideVtor>
     <CacheFlash>true</CacheFlash>