diff --git a/CMakeLists.txt b/CMakeLists.txt
index 92b075ebd..9bce386cf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -84,6 +84,7 @@ if (WIN32)
         src/net/Network_win.cpp
         )
 
+    add_definitions(/DWIN32)
     set(EXTRA_LIBS ws2_32 psapi iphlpapi userenv)
 elseif (APPLE)
     set(SOURCES_OS
diff --git a/src/Cpu_unix.cpp b/src/Cpu_unix.cpp
index cddf54f1f..1b7c6b0a8 100644
--- a/src/Cpu_unix.cpp
+++ b/src/Cpu_unix.cpp
@@ -42,10 +42,6 @@ void Cpu::init()
 
 void Cpu::setAffinity(int id, unsigned long mask)
 {
-    if (id == -1) {
-        return;
-    }
-    
     cpu_set_t set;
     CPU_ZERO(&set);