diff --git a/src/node_child_process.cc b/src/node_child_process.cc
index 8848a79cdb..000817316a 100644
--- a/src/node_child_process.cc
+++ b/src/node_child_process.cc
@@ -1,3 +1,5 @@
+#ifdef __POSIX__
+
 // Copyright 2009 Ryan Dahl <ry@tinyclouds.org>
 #include <node_child_process.h>
 #include <node.h>
@@ -378,3 +380,5 @@ int ChildProcess::Kill(int sig) {
 }  // namespace node
 
 NODE_MODULE(node_child_process, node::ChildProcess::Initialize);
+
+#endif // __POSIX__
diff --git a/src/node_extensions.h b/src/node_extensions.h
index 131d34e6f1..a7db557ecb 100644
--- a/src/node_extensions.h
+++ b/src/node_extensions.h
@@ -2,7 +2,9 @@
 NODE_EXT_LIST_START
 NODE_EXT_LIST_ITEM(node_buffer)
 NODE_EXT_LIST_ITEM(node_cares)
+#ifdef __POSIX__
 NODE_EXT_LIST_ITEM(node_child_process)
+#endif
 #ifdef HAVE_OPENSSL
 NODE_EXT_LIST_ITEM(node_crypto)
 #endif