diff --git a/decoder/ih264d_defs.h b/decoder/ih264d_defs.h
index 3dd5508..4622775 100644
--- a/decoder/ih264d_defs.h
+++ b/decoder/ih264d_defs.h
@@ -34,8 +34,8 @@
  *
  ************************************************************************
  */
-#define H264_MAX_FRAME_WIDTH                4096
-#define H264_MAX_FRAME_HEIGHT               4096
+#define H264_MAX_FRAME_WIDTH                4080
+#define H264_MAX_FRAME_HEIGHT               4080
 #define H264_MAX_FRAME_SIZE                 (4096 * 2048)
 
 #define H264_MIN_FRAME_WIDTH                16