diff --git a/build/arduino-builder-arm-1.3.21.tar.bz2.sha b/build/arduino-builder-arm-1.3.21_r1.tar.bz2.sha
similarity index 100%
rename from build/arduino-builder-arm-1.3.21.tar.bz2.sha
rename to build/arduino-builder-arm-1.3.21_r1.tar.bz2.sha
diff --git a/build/arduino-builder-linux32-1.3.21.tar.bz2.sha b/build/arduino-builder-linux32-1.3.21_r1.tar.bz2.sha
similarity index 100%
rename from build/arduino-builder-linux32-1.3.21.tar.bz2.sha
rename to build/arduino-builder-linux32-1.3.21_r1.tar.bz2.sha
diff --git a/build/arduino-builder-linux64-1.3.21.tar.bz2.sha b/build/arduino-builder-linux64-1.3.21_r1.tar.bz2.sha
similarity index 100%
rename from build/arduino-builder-linux64-1.3.21.tar.bz2.sha
rename to build/arduino-builder-linux64-1.3.21_r1.tar.bz2.sha
diff --git a/build/arduino-builder-macosx-1.3.21.tar.bz2.sha b/build/arduino-builder-macosx-1.3.21.tar.bz2.sha
deleted file mode 100644
index c22a0dd71..000000000
--- a/build/arduino-builder-macosx-1.3.21.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-1ac33dff5752a3998df420ae310d35cfe0c9af1f
diff --git a/build/arduino-builder-macosx-1.3.21_r1.tar.bz2.sha b/build/arduino-builder-macosx-1.3.21_r1.tar.bz2.sha
new file mode 100644
index 000000000..f48daeed4
--- /dev/null
+++ b/build/arduino-builder-macosx-1.3.21_r1.tar.bz2.sha
@@ -0,0 +1 @@
+c5ccdd0ffba382f8252d70a049fc9377592fee84
diff --git a/build/arduino-builder-windows-1.3.21.zip.sha b/build/arduino-builder-windows-1.3.21_r1.zip.sha
similarity index 100%
rename from build/arduino-builder-windows-1.3.21.zip.sha
rename to build/arduino-builder-windows-1.3.21_r1.zip.sha
diff --git a/build/build.xml b/build/build.xml
index 258b22a71..616f235c7 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -85,7 +85,7 @@
-
+