diff --git a/amd64.c b/amd64.c
index 235708ab..15468090 100644
--- a/amd64.c
+++ b/amd64.c
@@ -1,9 +1,3 @@
-/*
-  libco.amd64 (2016-09-14)
-  author: byuu
-  license: public domain
-*/
-
 #define LIBCO_C
 #include "libco.h"
 #include "settings.h"
diff --git a/arm.c b/arm.c
index 25f0b16c..313f1134 100644
--- a/arm.c
+++ b/arm.c
@@ -1,9 +1,3 @@
-/*
-  libco.arm (2016-09-14)
-  author: byuu
-  license: public domain
-*/
-
 #define LIBCO_C
 #include "libco.h"
 #include "settings.h"
diff --git a/fiber.c b/fiber.c
index f2c5b726..38a293df 100644
--- a/fiber.c
+++ b/fiber.c
@@ -1,9 +1,3 @@
-/*
-  libco.win (2008-01-28)
-  authors: Nach, byuu
-  license: public domain
-*/
-
 #define LIBCO_C
 #include "libco.h"
 
diff --git a/libco.c b/libco.c
index 13eb2379..77873fa3 100644
--- a/libco.c
+++ b/libco.c
@@ -1,8 +1,3 @@
-/*
-  libco
-  license: public domain
-*/
-
 #if defined(__clang__)
   #pragma clang diagnostic ignored "-Wparentheses"
 #endif
diff --git a/ppc.c b/ppc.c
index efec3aa8..6d79b44f 100644
--- a/ppc.c
+++ b/ppc.c
@@ -1,9 +1,3 @@
-/*
-  libco.ppc (2016-09-14)
-  author: blargg
-  license: public domain
-*/
-
 #define LIBCO_C
 #include "libco.h"
 #include "settings.h"
diff --git a/sjlj.c b/sjlj.c
index f62b000e..4d5017f5 100644
--- a/sjlj.c
+++ b/sjlj.c
@@ -1,9 +1,3 @@
-/*
-  libco.sjlj (2008-01-28)
-  author: Nach
-  license: public domain
-*/
-
 /*
   note this was designed for UNIX systems. Based on ideas expressed in a paper by Ralf Engelschall.
   for SJLJ on other systems, one would want to rewrite springboard() and co_create() and hack the jmb_buf stack pointer.
@@ -11,6 +5,7 @@
 
 #define LIBCO_C
 #include "libco.h"
+#include "settings.h"
 
 #define _XOPEN_SOURCE 500
 #include <stdlib.h>
diff --git a/ucontext.c b/ucontext.c
index 72ea8719..f4527bfb 100644
--- a/ucontext.c
+++ b/ucontext.c
@@ -1,9 +1,3 @@
-/*
-  libco.ucontext (2008-01-28)
-  author: Nach
-  license: public domain
-*/
-
 /*
   WARNING: the overhead of POSIX ucontext is very high,
   assembly versions of libco or libco_sjlj should be much faster
diff --git a/x86.c b/x86.c
index def3ac1c..b5c38216 100644
--- a/x86.c
+++ b/x86.c
@@ -1,9 +1,3 @@
-/*
-  libco.x86 (2016-09-14)
-  author: byuu
-  license: public domain
-*/
-
 #define LIBCO_C
 #include "libco.h"
 #include "settings.h"