diff --git a/kernel/lib_log.c b/kernel/lib_log.c
index 5baf122c..20109e71 100644
--- a/kernel/lib_log.c
+++ b/kernel/lib_log.c
@@ -412,7 +412,7 @@ bool log_finalize(struct log_status *logst, int len, void (*endio)(void *private
 	padded_len = len;
 	if (logst->do_compress) {
 		int new_len = log_compress(logst, len, &check_flags);
-		int padded_new_len = ((new_len + 7) / 8) * 8;
+		int padded_new_len = ((new_len + (_LOG_PAD-1)) / _LOG_PAD) * _LOG_PAD;
 
 		if (new_len > 0 && padded_new_len < len) {
 			/* exchange the lengths */
diff --git a/kernel/lib_log.h b/kernel/lib_log.h
index dce71816..7a1b8c2c 100644
--- a/kernel/lib_log.h
+++ b/kernel/lib_log.h
@@ -100,6 +100,10 @@ struct log_header_v1 {
 
 #define OVERHEAD (START_OVERHEAD + END_OVERHEAD)
 
+/* alignment of log positions to 64bit */
+#define _LOG_PAD_BITS 3
+#define _LOG_PAD (1 << _LOG_PAD_BITS)
+
 // TODO: make this bytesex-aware.
 #define DATA_PUT(data,offset,val)				\
 	do {							\