diff --git a/rwkv.cpp b/rwkv.cpp
index 9119d13..77a3f95 100644
--- a/rwkv.cpp
+++ b/rwkv.cpp
@@ -16,6 +16,11 @@
 
 #include <sys/stat.h> // fstat
 
+#ifdef WIN32
+#define stat64 _stat64
+#define fstat64 _fstat64
+#endif
+
 // --- Error handling ---
 
 thread_local enum rwkv_error_flags global_last_error = RWKV_ERROR_NONE;
@@ -292,8 +297,8 @@ struct rwkv_context * rwkv_init_from_file(const char * file_path, const uint32_t
     RWKV_ASSERT_NULL_MSG(RWKV_ERROR_FILE | RWKV_ERROR_FILE_OPEN, file, "Failed to open file %s", file_path);
     rwkv_file_guard file_guard { file };
 
-    struct stat file_stat;
-    RWKV_ASSERT_NULL_MSG(RWKV_ERROR_FILE | RWKV_ERROR_FILE_STAT, fstat(fileno(file), &file_stat) == 0, "Failed to stat file %s", file_path);
+    struct stat64 file_stat;
+    RWKV_ASSERT_NULL_MSG(RWKV_ERROR_FILE | RWKV_ERROR_FILE_STAT, fstat64(fileno(file), &file_stat) == 0, "Failed to stat file %s", file_path);
 
     int32_t magic;
     RWKV_ASSERT_NULL(RWKV_ERROR_FILE, read_int32(file, &magic, "magic"));