diff --git a/libc/include/sys/select.h b/libc/include/sys/select.h
index 5a8a81d..df118e3 100644
--- a/libc/include/sys/select.h
+++ b/libc/include/sys/select.h
@@ -29,11 +29,12 @@
 #ifndef _SYS_SELECT_H_
 #define _SYS_SELECT_H_
 
-#include <linux/time.h>
-#include <signal.h>
 #include <sys/cdefs.h>
 #include <sys/types.h>
 
+#include <linux/time.h>
+#include <signal.h>
+
 __BEGIN_DECLS
 
 #define FD_SETSIZE 1024
diff --git a/libc/include/sys/signalfd.h b/libc/include/sys/signalfd.h
index a21c57b..79f9490 100644
--- a/libc/include/sys/signalfd.h
+++ b/libc/include/sys/signalfd.h
@@ -29,9 +29,10 @@
 #ifndef _SYS_SIGNALFD_H_
 #define _SYS_SIGNALFD_H_
 
+#include <sys/cdefs.h>
+
 #include <linux/signalfd.h>
 #include <signal.h>
-#include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
diff --git a/libc/include/sys/ucontext.h b/libc/include/sys/ucontext.h
index fdb3015..4eddf23 100644
--- a/libc/include/sys/ucontext.h
+++ b/libc/include/sys/ucontext.h
@@ -29,8 +29,9 @@
 #ifndef _SYS_UCONTEXT_H_
 #define _SYS_UCONTEXT_H_
 
-#include <signal.h>
 #include <sys/cdefs.h>
+
+#include <signal.h>
 #include <sys/user.h>
 
 __BEGIN_DECLS