diff --git cpp/src/plasma/client.cc cpp/src/plasma/client.cc
index 5142ee435..5266e3e66 100644
--- cpp/src/plasma/client.cc
+++ cpp/src/plasma/client.cc
@@ -19,10 +19,6 @@
 
 #include "plasma/client.h"
 
-#ifdef _WIN32
-#include <Win32_Interop/win32_types.h>
-#endif
-
 #include <fcntl.h>
 #include <netinet/in.h>
 #include <stdio.h>
diff --git cpp/src/plasma/plasma.h cpp/src/plasma/plasma.h
index 79e33c2f0..c8241b2fe 100644
--- cpp/src/plasma/plasma.h
+++ cpp/src/plasma/plasma.h
@@ -25,7 +25,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>  // pid_t
 
 #include <memory>
 #include <string>
--