diff --git a/minui/graphics.c b/minui/graphics.c
index 948a07c..3713f61 100644
--- a/minui/graphics.c
+++ b/minui/graphics.c
@@ -175,7 +175,7 @@
     fb->stride = fi.line_length/PIXEL_SIZE;
     fb->format = PIXEL_FORMAT;
     if (!has_overlay) {
-        fb->data = (void*) (((unsigned) bits) + vi.yres * fi.line_length);
+        fb->data = (void*) (((unsigned long) bits) + vi.yres * fi.line_length);
         memset(fb->data, 0, vi.yres * fi.line_length);
     }