openbsd
diff --git a/src/libthread/threadimpl.h b/src/libthread/threadimpl.h
index fff874d..ad66ee5 100644
--- a/src/libthread/threadimpl.h
+++ b/src/libthread/threadimpl.h
@@ -5,7 +5,7 @@
#include <sys/wait.h>
#include <sched.h>
#include <signal.h>
-#if !defined(_OpenBSD__)
+#if !defined(__OpenBSD__)
# include <ucontext.h>
#endif
#include <sys/utsname.h>
@@ -28,7 +28,11 @@
#endif
#if defined(__OpenBSD__)
-# include "power-ucontext.h"
+# if defined __i386__
+# include "386-ucontext.h"
+# else
+# include "power-ucontext.h"
+# endif
extern pid_t rfork_thread(int, void*, int(*)(void*), void*);
#endif