Added missing comma in binding.gyp.
diff --git a/src/node/binding.gyp b/src/node/binding.gyp
index 83f72fa..259c0b5 100644
--- a/src/node/binding.gyp
+++ b/src/node/binding.gyp
@@ -10,7 +10,7 @@
         '-pthread',
         '-pedantic',
         '-g',
-        '-zdefs'
+        '-zdefs',
         '-Werror'
       ],
       'ldflags': [