diff --git a/update_depot_tools b/update_depot_tools
index 127aa2b5d..993298f91 100755
--- a/update_depot_tools
+++ b/update_depot_tools
@@ -160,6 +160,17 @@ fi
 # We're on POSIX. We can now safely look for svn checkout.
 if [ "X$DEPOT_TOOLS_UPDATE" != "X0" -a -e "$base_dir/.svn" ]
 then
+  echo "========================"
+  echo "WARNING: You have an SVN checkout of depot_tools!"
+  echo
+  echo "depot_tools is migrating to Git on June 6, 2016. If you still have an"
+  echo "SVN checkout then, you will STOP RECEIVING UPDATES to depot_tools."
+  echo
+  echo "Before that date, please follow the instructions here[1] to get a Git"
+  echo "copy of depot_tools."
+  echo
+  echo "[1]: https://www.chromium.org/developers/how-tos/install-depot-tools"
+  echo "========================"
   # Update the root directory to stay up-to-date with the latest depot_tools.
   BEFORE_REVISION=$(get_svn_revision)
   if echo $* | grep -e --force > /dev/null; then
diff --git a/update_depot_tools.bat b/update_depot_tools.bat
index 761c5b348..73639af51 100644
--- a/update_depot_tools.bat
+++ b/update_depot_tools.bat
@@ -38,6 +38,17 @@ goto :EOF
 
 
 :SVN_UPDATE
+echo ========================
+echo WARNING: You have an SVN checkout of depot_tools!
+echo.
+echo depot_tools is migrating to Git on June 6, 2016. If you still have an
+echo SVN checkout then, you will STOP RECEIVING UPDATES to depot_tools.
+echo.
+echo Before that date, please follow the instructions here[1] to get a Git
+echo copy of depot_tools.
+echo.
+echo [1]: https://www.chromium.org/developers/how-tos/install-depot-tools
+echo ========================
 FOR %%A IN (%*) DO (
   IF "%%A" == "--force" (
     call svn -q revert -R "%DEPOT_TOOLS_DIR%."