diff --git a/radio/src/thirdparty/libopenui/tools/encode-bitmap.py b/radio/src/thirdparty/libopenui/tools/encode-bitmap.py
index a6768a3cf..778324fd4 100755
--- a/radio/src/thirdparty/libopenui/tools/encode-bitmap.py
+++ b/radio/src/thirdparty/libopenui/tools/encode-bitmap.py
@@ -114,8 +114,7 @@ class ImageEncoder:
         for y in range(height):
             for x in range(width):
                 value = self.get_pixel(image, x, y)
-                value = 0x0F - round(value / 16)
-                value = max(0x00, min(0x0F, value))
+                value = 0xFF - value
                 self.encode_byte(value)
             self.f.write("\n")
         self.encode_end()