diff --git a/src/libsystemd/sd-bus/bus-internal.c b/src/libsystemd/sd-bus/bus-internal.c
index ced330857a..b74edda943 100644
--- a/src/libsystemd/sd-bus/bus-internal.c
+++ b/src/libsystemd/sd-bus/bus-internal.c
@@ -5,6 +5,7 @@
 #include "bus-message.h"
 #include "hexdecoct.h"
 #include "string-util.h"
+#include "escape.h"
 
 bool object_path_is_valid(const char *p) {
         const char *q;