diff --git a/src/activities/boot_sleep/SleepActivity.cpp b/src/activities/boot_sleep/SleepActivity.cpp
index 994b85b7..03b41963 100644
--- a/src/activities/boot_sleep/SleepActivity.cpp
+++ b/src/activities/boot_sleep/SleepActivity.cpp
@@ -19,6 +19,8 @@
 #include "components/UITheme.h"
 #include "fontIds.h"
 #include "images/Logo120.h"
+#include "util/StringUtils.h"
+
 
 namespace {