diff --git a/Sts1CobcSw/FileSystem/LfsWrapper.cpp b/Sts1CobcSw/FileSystem/LfsWrapper.cpp
index 8d691946..2dcc721f 100644
--- a/Sts1CobcSw/FileSystem/LfsWrapper.cpp
+++ b/Sts1CobcSw/FileSystem/LfsWrapper.cpp
@@ -45,10 +45,11 @@ auto Unmount() -> Result<void>
 }
 
 
-auto Open(std::string_view path, int flags) -> Result<File>
+auto Open(std::string_view path, unsigned int flags) -> Result<File>
 {
     auto file = File();
-    auto error = lfs_file_opencfg(&lfs, &file.lfsFile_, path.data(), flags, &file.lfsFileConfig_);
+    auto error = lfs_file_opencfg(
+        &lfs, &file.lfsFile_, path.data(), static_cast<int>(flags), &file.lfsFileConfig_);
     if(error == 0)
     {
         file.path_ = Path(path.data(), path.size());
@@ -66,8 +67,8 @@ File::File(File && other) noexcept
     {
         return;
     }
-    auto error =
-        lfs_file_opencfg(&lfs, &lfsFile_, other.path_.c_str(), other.openFlags_, &lfsFileConfig_);
+    auto error = lfs_file_opencfg(
+        &lfs, &lfsFile_, other.path_.c_str(), static_cast<int>(other.openFlags_), &lfsFileConfig_);
     if(error == 0)
     {
         path_ = other.path_;
@@ -86,8 +87,11 @@ auto File::operator=(File && other) noexcept -> File &
     // TODO: Use copy and swap idiom to prevent code duplication from move constructor
     if(this != &other and not other.path_.empty())
     {
-        auto error = lfs_file_opencfg(
-            &lfs, &lfsFile_, other.path_.c_str(), other.openFlags_, &lfsFileConfig_);
+        auto error = lfs_file_opencfg(&lfs,
+                                      &lfsFile_,
+                                      other.path_.c_str(),
+                                      static_cast<int>(other.openFlags_),
+                                      &lfsFileConfig_);
         if(error == 0)
         {
             path_ = other.path_;
diff --git a/Sts1CobcSw/FileSystem/LfsWrapper.hpp b/Sts1CobcSw/FileSystem/LfsWrapper.hpp
index e39904f2..1395bdb9 100644
--- a/Sts1CobcSw/FileSystem/LfsWrapper.hpp
+++ b/Sts1CobcSw/FileSystem/LfsWrapper.hpp
@@ -27,7 +27,7 @@ class File;
 
 [[nodiscard]] auto Mount() -> Result<void>;
 [[nodiscard]] auto Unmount() -> Result<void>;
-[[nodiscard]] auto Open(std::string_view path, int flags) -> Result<File>;
+[[nodiscard]] auto Open(std::string_view path, unsigned int flags) -> Result<File>;
 
 
 // FIXME: Make File const-correct (only Write() should be non-const)
@@ -51,15 +51,15 @@ class File
     [[nodiscard]] auto Size() -> Result<int>;
     [[nodiscard]] auto Close() -> Result<void>;
 
-    friend auto Open(std::string_view path, int flags) -> Result<File>;
+    friend auto Open(std::string_view path, unsigned int flags) -> Result<File>;
 
 private:
     // Only allow creation of File class through friend function Open()
     File() = default;
 
     Path path_ = "";
-    int openFlags_ = 0;
     bool isOpen_ = false;
+    unsigned int openFlags_ = 0;
     std::array<Byte, lfsCacheSize> buffer_ = {};
     lfs_file_t lfsFile_ = {};
     lfs_file_config lfsFileConfig_ = {.buffer = buffer_.data()};
diff --git a/Sts1CobcSw/FileSystem/LfsWrapper.ipp b/Sts1CobcSw/FileSystem/LfsWrapper.ipp
index 74fc8b13..e471afd9 100644
--- a/Sts1CobcSw/FileSystem/LfsWrapper.ipp
+++ b/Sts1CobcSw/FileSystem/LfsWrapper.ipp
@@ -16,7 +16,7 @@ auto File::Read(T * t) -> Result<int>
     {
         return ErrorCode::fileNotOpen;
     }
-    if(not(static_cast<uint>(openFlags_) & LFS_O_RDONLY))
+    if(not(openFlags_ & LFS_O_RDONLY))
     {
         return ErrorCode::unsupportedOperation;
     }
@@ -36,7 +36,7 @@ auto File::Write(T const & t) -> Result<int>
     {
         return ErrorCode::fileNotOpen;
     }
-    if(not(static_cast<uint>(openFlags_) & LFS_O_WRONLY))
+    if(not(openFlags_ & LFS_O_WRONLY))
     {
         return ErrorCode::unsupportedOperation;
     }