diff --git a/count-delta.c b/count-delta.c
index dd81e92965..3bcc205f51 100644
--- a/count-delta.c
+++ b/count-delta.c
@@ -6,7 +6,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <limits.h>
-#include "delta.h"
 #include "count-delta.h"
 
 static unsigned long get_hdr_size(const unsigned char **datap)
diff --git a/diffcore-pathspec.c b/diffcore-pathspec.c
index 0392d66a55..7f18a6ca3c 100644
--- a/diffcore-pathspec.c
+++ b/diffcore-pathspec.c
@@ -4,7 +4,6 @@
 #include "cache.h"
 #include "diff.h"
 #include "diffcore.h"
-#include "delta.h"
 
 struct path_spec {
 	const char *spec;
diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c
index ef9c5c1d21..4c26b422f9 100644
--- a/diffcore-pickaxe.c
+++ b/diffcore-pickaxe.c
@@ -4,7 +4,6 @@
 #include "cache.h"
 #include "diff.h"
 #include "diffcore.h"
-#include "delta.h"
 
 static int contains(struct diff_filespec *one,
 		    const char *needle, unsigned long len)