diff --git a/libretro-common/include/streams/file_stream.h b/libretro-common/include/streams/file_stream.h
index 5e4294effa..40b867b007 100644
--- a/libretro-common/include/streams/file_stream.h
+++ b/libretro-common/include/streams/file_stream.h
@@ -47,6 +47,10 @@ enum
    RFILE_HINT_MMAP       = 1<<9  /* requires RFILE_MODE_READ */
 };
 
+long long int filestream_get_size(RFILE *stream);
+
+void filestream_set_size(RFILE *stream);
+
 const char *filestream_get_ext(RFILE *stream);
 
 RFILE *filestream_open(const char *path, unsigned mode, ssize_t len);
diff --git a/libretro-common/streams/file_stream.c b/libretro-common/streams/file_stream.c
index b717f04880..46d99f61c2 100644
--- a/libretro-common/streams/file_stream.c
+++ b/libretro-common/streams/file_stream.c
@@ -69,6 +69,7 @@ struct RFILE
 {
    unsigned hints;
    char *ext;
+   long long int size;
 #if defined(PSP)
    SceUID fd;
 #else
@@ -110,6 +111,26 @@ const char *filestream_get_ext(RFILE *stream)
    return stream->ext;
 }
 
+long long int filestream_get_size(RFILE *stream)
+{
+   if (!stream)
+      return 0;
+   return stream->size;
+}
+
+void filestream_set_size(RFILE *stream)
+{
+   if (!stream)
+      return;
+
+   filestream_seek(stream, 0, SEEK_SET);
+   filestream_seek(stream, 0, SEEK_END);
+
+   stream->size = filestream_tell(stream);
+
+   filestream_seek(stream, 0, SEEK_SET);
+}
+
 RFILE *filestream_open(const char *path, unsigned mode, ssize_t len)
 {
    int            flags = 0;
@@ -249,6 +270,8 @@ RFILE *filestream_open(const char *path, unsigned mode, ssize_t len)
       stream->ext    = strdup(ld ? ld + 1 : "");
    }
 
+   filestream_set_size(stream);
+
    return stream;
 
 error: