diff --git a/scripts/LVGLImage.py b/scripts/LVGLImage.py
index 9ad0180cd0..eb76f69d02 100755
--- a/scripts/LVGLImage.py
+++ b/scripts/LVGLImage.py
@@ -469,7 +469,9 @@ class LVGLCompressData:
 
         if self.compress == CompressMethod.RLE:
             # RLE compression performs on pixel unit, pad data to pixel unit
-            pad = b'\x00' * (self.blk_size - self.raw_data_len % self.blk_size)
+            pad = b'\x00' * 0
+            if self.raw_data_len % self.blk_size:
+                pad = b'\x00' * (self.blk_size - self.raw_data_len % self.blk_size)
             compressed = RLEImage().rle_compress(raw_data + pad, self.blk_size)
         elif self.compress == CompressMethod.LZ4:
             compressed = lz4.block.compress(raw_data, store_size=False)