diff --git a/common.gypi b/common.gypi
index d4c610576e..c03a8fac72 100644
--- a/common.gypi
+++ b/common.gypi
@@ -171,6 +171,7 @@
           'GCC_VERSION': '4.2',
           'GCC_WARN_ABOUT_MISSING_NEWLINE': 'YES',  # -Wnewline-eof
           'PREBINDING': 'NO',                       # No -Wl,-prebind
+          'MACOSX_DEPLOYMENT_TARGET': '10.5',
           'USE_HEADERMAP': 'NO',
           'OTHER_CFLAGS': [
             '-fno-strict-aliasing',