diff --git a/include/affinity.h b/include/affinity.h
index ff3dd860a..9ba0d6e1b 100644
--- a/include/affinity.h
+++ b/include/affinity.h
@@ -11,9 +11,6 @@
 
 #if defined (_POSIX)
 #include <pthread.h>
-#if defined (__linux__)
-#include <sys/sysctl.h>
-#endif // __linux__
 #endif // _POSIX
 
 #if defined (__APPLE__)