diff --git a/addon.gypi b/addon.gypi
index 878f61f3a6..55fb321118 100644
--- a/addon.gypi
+++ b/addon.gypi
@@ -18,7 +18,10 @@
     'include_dirs': [
       '<(node_root_dir)/include/node',
       '<(node_root_dir)/src',
+      '<(node_root_dir)/deps/openssl/config',
+      '<(node_root_dir)/deps/openssl/openssl/include',
       '<(node_root_dir)/deps/uv/include',
+      '<(node_root_dir)/deps/zlib',
       '<(node_root_dir)/<(node_engine_include_dir)'
     ],
     'defines!': [