Continue the pthreads torture.
diff --git a/include/u.h b/include/u.h
index 8e79ba6..c1ca033 100644
--- a/include/u.h
+++ b/include/u.h
@@ -24,7 +24,6 @@
#include <fmt.h>
#include <math.h>
#include <ctype.h> /* for tolower */
-#include <pthread.h> /* for Locks */
/*
* OS-specific crap
@@ -42,8 +41,10 @@
# undef _NEEDUSHORT
# undef _NEEDUINT
# undef _NEEDULONG
-# include <pthread.h>
-# define PLAN9_PTHREADS
+# endif
+# if defined(__Linux26__)
+# include <pthread.h>
+# define PLAN9_PTHREADS 1
# endif
#endif
#if defined(__sun__)
