diff --git a/Source/NSThread.m b/Source/NSThread.m
index 77c2c8733..2e0f70fed 100644
--- a/Source/NSThread.m
+++ b/Source/NSThread.m
@@ -31,10 +31,13 @@
 */
 
 #import "common.h"
-#include <processthreadsapi.h>
 
 #import "GSPThread.h"
 
+#ifdef _WIN32
+#import <processthreadsapi.h>
+#endif
+
 // Dummy implementatation
 // cleaner than IFDEF'ing the code everywhere
 #ifndef HAVE_PTHREAD_SPIN_LOCK