diff --git a/src/Types.h b/src/Types.h
index 1afad3e..833c7c1 100644
--- a/src/Types.h
+++ b/src/Types.h
@@ -3,7 +3,7 @@
 
 #include "Boards.h"
 
-enum FileMode { READ, WRITE, APPEND };
+enum class FileMode { READ, WRITE, APPEND };
 
 #if defined(USES_RENESAS_CORE)
     #include "BlockDevice.h"
diff --git a/src/UFile.cpp b/src/UFile.cpp
index be8c806..c7d759a 100644
--- a/src/UFile.cpp
+++ b/src/UFile.cpp
@@ -21,13 +21,13 @@ bool UFile::open(const char* filename, FileMode fileMode) {
     path = filename;
     // Set the mode based on the fileMode
     switch (fileMode) {
-        case READ:
+        case FileMode::READ:
             mode = "r+";
             break;
-        case WRITE:
+        case FileMode::WRITE:
             mode = "w+";
             break;
-        case APPEND:
+        case FileMode::APPEND:
             mode = "a+";
             break;
         default: