diff --git a/src/video/stb_image.h b/src/video/stb_image.h
index 977785fa77..76094f102e 100644
--- a/src/video/stb_image.h
+++ b/src/video/stb_image.h
@@ -895,6 +895,8 @@ static void stbi__refill_buffer(stbi__context *s);
 static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len)
 {
    s->io.read = NULL;
+   s->io.skip = NULL;
+   s->io.eof = NULL;
    s->read_from_callbacks = 0;
    s->callback_already_read = 0;
    s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer;