diff --git a/aos/build/build.py b/aos/build/build.py
index 9f126c6..b0e5021 100755
--- a/aos/build/build.py
+++ b/aos/build/build.py
@@ -662,7 +662,7 @@
       if platform.compiler() == 'gcc' and platform.architecture() == 'amd64':
         packages.add('gcc-4.7')
         packages.add('g++-4.7')
-      elif platform.compiler() == 'gcc_frc' || platform.compiler() == 'clang_frc':
+      elif platform.compiler() == 'gcc_frc' or platform.compiler() == 'clang_frc':
         packages.add('gcc-4.9-arm-frc-linux-gnueabi')
         packages.add('g++-4.9-arm-frc-linux-gnueabi')