diff --git a/build/build.xml b/build/build.xml
index 49d93a79f..e1bc97c47 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -814,8 +814,8 @@
 
     <!-- Unzip AVR tools -->
     <antcall target="unzip">
-      <param name="archive_file" value="${staging_folder}/avr-toolchain-win32-3.4.5.zip" />
-      <param name="archive_url" value="http://arduino.cc/download.php?f=/avr-toolchain-win32-3.4.5.zip" />
+      <param name="archive_file" value="${staging_folder}/avr-toolchain-win32-3.4.5-arduino1.zip" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/avr-toolchain-win32-3.4.5-arduino1.zip" />
       <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/avr" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/avr" />
     </antcall>
diff --git a/build/windows/avr-toolchain-win32-3.4.5-arduino1.zip.sha b/build/windows/avr-toolchain-win32-3.4.5-arduino1.zip.sha
new file mode 100644
index 000000000..bd01f1dae
--- /dev/null
+++ b/build/windows/avr-toolchain-win32-3.4.5-arduino1.zip.sha
@@ -0,0 +1 @@
+077d8d7f0234a65f754bca44fe37497f08c0bd90
diff --git a/build/windows/avr-toolchain-win32-3.4.5.zip.sha b/build/windows/avr-toolchain-win32-3.4.5.zip.sha
deleted file mode 100644
index fd8cce89b..000000000
--- a/build/windows/avr-toolchain-win32-3.4.5.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-e089689f38dbd98acca2e7ae4e1219773afbeecd