diff --git a/src/core/fs.c b/src/core/fs.c
index dc0bcd50..bf5d32f6 100644
--- a/src/core/fs.c
+++ b/src/core/fs.c
@@ -41,14 +41,14 @@ bool fs_close(fs_handle file) {
 }
 
 bool fs_read(fs_handle file, void* buffer, size_t* bytes) {
-  uint32_t bytes32 = *bytes > UINT32_MAX ? UINT32_MAX : (uint32_t) *bytes;
+  DWORD bytes32 = *bytes > UINT32_MAX ? UINT32_MAX : (DWORD) *bytes;
   bool success = ReadFile(file.handle, buffer, bytes32, &bytes32, NULL);
   *bytes = bytes32;
   return success;
 }
 
 bool fs_write(fs_handle file, const void* buffer, size_t* bytes) {
-  uint32_t bytes32 = *bytes > UINT32_MAX ? UINT32_MAX : (uint32_t) *bytes;
+  DWORD bytes32 = *bytes > UINT32_MAX ? UINT32_MAX : (DWORD) *bytes;
   bool success = WriteFile(file.handle, buffer, bytes32, &bytes32, NULL);
   *bytes = bytes32;
   return success;