--- src/flac/encode.c	2008-12-23 11:40:28.000000000 +0000
+++ src/flac/encode.c	2009-03-01 00:22:16.000000000 +0000
@@ -1061,7 +1061,10 @@
 							print_error_with_state(&encoder_session, "ERROR during encoding");
 							return EncoderSession_finish_error(&encoder_session);
 						}
-						data_bytes -= bytes_read;
+
+						if (!options.common.ignore_chunk_sizes) {
+							data_bytes -= bytes_read;
+						}
 					}
 				}
 			}