diff --git a/rc/env.sh b/rc/env.sh
index 34dca31..be540ce 100644
--- a/rc/env.sh
+++ b/rc/env.sh
@@ -1,3 +1,6 @@
 export PAGER=less
 export EDITOR=vim
 
+# https://docs.microsoft.com/en-us/dotnet/core/tools/telemetry
+export DOTNET_CLI_TELEMETRY_OPTOUT=1
+