diff --git a/lrzip.c b/lrzip.c
index b260a50..9dec7ab 100644
--- a/lrzip.c
+++ b/lrzip.c
@@ -1006,7 +1006,7 @@ bool get_fileinfo(rzip_control *control)
 			if (unlikely(read(fd_in, &chunk_size, chunk_byte) != chunk_byte))
 				fatal_goto(("Failed to read chunk_size in get_fileinfo\n"), error);
 			chunk_size = le64toh(chunk_size);
-			if (unlikely(chunk_size < 0))
+			if (unlikely(chunk_size <= 0))
 				fatal_goto(("Invalid chunk size %lld\n", chunk_size), error);
 		}
 	}
diff --git a/stream.c b/stream.c
index 4ca6db0..9e789d4 100644
--- a/stream.c
+++ b/stream.c
@@ -1117,7 +1117,7 @@ void *open_stream_in(rzip_control *control, int f, int n, char chunk_bytes)
 			sinfo->size = le64toh(sinfo->size);
 			print_maxverbose("Chunk size: %lld\n", sinfo->size);
 			control->st_size += sinfo->size;
-			if (unlikely(sinfo->chunk_bytes < 1 || sinfo->chunk_bytes > 8 || sinfo->size < 0)) {
+			if (unlikely(sinfo->chunk_bytes < 1 || sinfo->chunk_bytes > 8 || sinfo->size <= 0)) {
 				print_err("Invalid chunk data size %d bytes %lld\n", sinfo->size, sinfo->chunk_bytes);
 				goto failed;
 			}