diff --git a/xdiff/xhistogram.c b/xdiff/xhistogram.c
index ec85f59..c7b35a9 100644
--- a/xdiff/xhistogram.c
+++ b/xdiff/xhistogram.c
@@ -42,8 +42,6 @@
  */
 
 #include "xinclude.h"
-#include "xtypes.h"
-#include "xdiff.h"
 
 #define MAX_PTR	UINT_MAX
 #define MAX_CNT	UINT_MAX
diff --git a/xdiff/xpatience.c b/xdiff/xpatience.c
index f3573d9..3c5601b 100644
--- a/xdiff/xpatience.c
+++ b/xdiff/xpatience.c
@@ -20,8 +20,6 @@
  *
  */
 #include "xinclude.h"
-#include "xtypes.h"
-#include "xdiff.h"
 
 /*
  * The basic idea of patience diff is to find lines that are unique in
diff --git a/xdiff/xutils.c b/xdiff/xutils.c
index 963e1c5..cfa6e22 100644
--- a/xdiff/xutils.c
+++ b/xdiff/xutils.c
@@ -20,13 +20,9 @@
  *
  */
 
-#include <limits.h>
-#include <assert.h>
 #include "xinclude.h"
 
 
-
-
 long xdl_bogosqrt(long n) {
 	long i;