diff --git a/credential-cache--daemon.c b/credential-cache--daemon.c
index eef6fce4c7..82715aa8b8 100644
--- a/credential-cache--daemon.c
+++ b/credential-cache--daemon.c
@@ -2,7 +2,6 @@
 #include "tempfile.h"
 #include "credential.h"
 #include "unix-socket.h"
-#include "sigchain.h"
 #include "parse-options.h"
 
 static struct tempfile socket_file;
diff --git a/diff.c b/diff.c
index 835a12e84d..80eb0c2156 100644
--- a/diff.c
+++ b/diff.c
@@ -13,7 +13,6 @@
 #include "run-command.h"
 #include "utf8.h"
 #include "userdiff.h"
-#include "sigchain.h"
 #include "submodule-config.h"
 #include "submodule.h"
 #include "ll-merge.h"
diff --git a/read-cache.c b/read-cache.c
index 87204a50a5..3ecb99dd2f 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -17,7 +17,6 @@
 #include "strbuf.h"
 #include "varint.h"
 #include "split-index.h"
-#include "sigchain.h"
 #include "utf8.h"
 
 static struct cache_entry *refresh_cache_entry(struct cache_entry *ce,
diff --git a/shallow.c b/shallow.c
index d49a3d6e9f..4f9d667236 100644
--- a/shallow.c
+++ b/shallow.c
@@ -10,7 +10,6 @@
 #include "diff.h"
 #include "revision.h"
 #include "commit-slab.h"
-#include "sigchain.h"
 
 static int is_shallow = -1;
 static struct stat_validity shallow_stat;