diff --git a/pkt-line.c b/pkt-line.c
index af83a19f4d..236dd3a3ee 100644
--- a/pkt-line.c
+++ b/pkt-line.c
@@ -4,6 +4,7 @@
 #include "gettext.h"
 #include "hex.h"
 #include "run-command.h"
+#include "sideband.h"
 #include "trace.h"
 #include "write-or-die.h"
 
diff --git a/pkt-line.h b/pkt-line.h
index 954eec8719..aedef56286 100644
--- a/pkt-line.h
+++ b/pkt-line.h
@@ -2,7 +2,6 @@
 #define PKTLINE_H
 
 #include "strbuf.h"
-#include "sideband.h"
 
 /*
  * Write a packetized stream, where each line is preceded by
diff --git a/t/helper/test-pkt-line.c b/t/helper/test-pkt-line.c
index f4d134a145..77e99c37df 100644
--- a/t/helper/test-pkt-line.c
+++ b/t/helper/test-pkt-line.c
@@ -1,6 +1,7 @@
 #include "git-compat-util.h"
 #include "test-tool.h"
 #include "pkt-line.h"
+#include "sideband.h"
 #include "write-or-die.h"
 
 static void pack_line(const char *line)