diff --git a/minui/graphics_fbdev.c b/minui/graphics_fbdev.c
index a91ea87..c0c1bcb 100644
--- a/minui/graphics_fbdev.c
+++ b/minui/graphics_fbdev.c
@@ -130,6 +130,8 @@
         return NULL;
     }
 
+    memset(bits, 0, fi.smem_len);
+
     gr_framebuffer[0].width = vi.xres;
     gr_framebuffer[0].height = vi.yres;
     gr_framebuffer[0].row_bytes = fi.line_length;