diff --git a/line-log.c b/line-log.c
index a878cb7810..c276ccec54 100644
--- a/line-log.c
+++ b/line-log.c
@@ -1,4 +1,5 @@
 #include "git-compat-util.h"
+#include "diffcore.h"
 #include "line-range.h"
 #include "hex.h"
 #include "tag.h"
diff --git a/line-log.h b/line-log.h
index 4291da8d79..e9dadbc1a5 100644
--- a/line-log.h
+++ b/line-log.h
@@ -1,8 +1,6 @@
 #ifndef LINE_LOG_H
 #define LINE_LOG_H
 
-#include "diffcore.h"
-
 struct rev_info;
 struct commit;
 struct string_list;
diff --git a/log-tree.c b/log-tree.c
index 504da6b519..337b9334cd 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -2,6 +2,7 @@
 #include "commit-reach.h"
 #include "config.h"
 #include "diff.h"
+#include "diffcore.h"
 #include "environment.h"
 #include "hex.h"
 #include "object-name.h"