diff --git a/gfx/fonts/bitmap.h b/gfx/fonts/bitmap.h
index caab215e45..1eb8d579c8 100644
--- a/gfx/fonts/bitmap.h
+++ b/gfx/fonts/bitmap.h
@@ -23,7 +23,7 @@
 
 #define FONT_OFFSET(x) ((x) * ((FONT_HEIGHT * FONT_WIDTH + 7) / 8))
 
-const unsigned char bitmap_bin[1792] = {
+static const unsigned char bitmap_bin[1792] = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,