diff --git a/build/build.xml b/build/build.xml
index 167531df0..d72b26de6 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -462,6 +462,14 @@
       <fileset file="windows/eeprom.h" />
     </copy>
 
+    <!-- Copy bossac.exe tool -->
+    <copy todir="windows/work/hardware/tools">
+      <fileset file="windows/bossac.exe" />
+    </copy>
+    <chmod perm="755">
+      <fileset file="windows/work/hardware/tools/bossac.exe" />
+    </chmod>
+
     <antcall target="assemble">
       <param name="target.path" value="windows/work" />
     </antcall>
diff --git a/build/windows/bossac.exe b/build/windows/bossac.exe
old mode 100644
new mode 100755
diff --git a/hardware/arduino/sam/platform.txt b/hardware/arduino/sam/platform.txt
index 6f72ada2d..63b9979da 100644
--- a/hardware/arduino/sam/platform.txt
+++ b/hardware/arduino/sam/platform.txt
@@ -53,6 +53,7 @@ recipe.size.regex=\.text\s+([0-9]+).*
 # -------------------
 
 tools.bossac.cmd=bossac
+tools.bossac.cmd.windows=bossac.exe
 tools.bossac.path={runtime.ide.path}/hardware/tools
 
 tools.bossac.upload.params.verbose=-i -d