diff --git a/libraries/FSTools/FSTools.cpp b/libraries/FSTools/FSTools.cpp
index c281b374f..fd34514c0 100644
--- a/libraries/FSTools/FSTools.cpp
+++ b/libraries/FSTools/FSTools.cpp
@@ -1,7 +1,7 @@
 #include "FSTools.h"
 #include "LittleFS.h"
 #include <spiffs_api.h>
-#include <ESP.h>
+#include <Esp.h>
 
 
 namespace FST {