diff --git a/src/apps/pulse/CPUButton.cpp b/src/apps/pulse/CPUButton.cpp
index 81bcdbe2bb..4209eb1496 100644
--- a/src/apps/pulse/CPUButton.cpp
+++ b/src/apps/pulse/CPUButton.cpp
@@ -12,6 +12,7 @@
 #include "CPUButton.h"
 
 #include <stdlib.h>
+#include <string.h>
 
 #include <Alert.h>
 #include <Dragger.h>