diff --git a/include/bx/os.h b/include/bx/os.h
index 327681d..58c315a 100644
--- a/include/bx/os.h
+++ b/include/bx/os.h
@@ -49,7 +49,7 @@
 #	elif BX_PLATFORM_OSX
 #		include <mach/mach.h> // mach_task_basic_info
 #	elif BX_PLATFORM_HURD
-#		include <unistd.h> // getpid
+#		include <pthread/pthread.h> // pthread_self
 #	elif BX_PLATFORM_ANDROID
 #		include "debug.h" // getTid is not implemented...
 #	endif // BX_PLATFORM_ANDROID