Index: sys/ddb/db_access.c
===================================================================
RCS file: /cvsroot/src/sys/ddb/db_access.c,v
retrieving revision 1.23
diff -u -r1.23 db_access.c
--- sys/ddb/db_access.c	4 Feb 2018 09:17:54 -0000	1.23
+++ sys/ddb/db_access.c	18 Aug 2019 22:23:47 -0000
@@ -70,7 +70,7 @@
 #else /* BYTE_ORDER == BIG_ENDIAN */
 	for (i = 0; i < size; i++)
 #endif /* BYTE_ORDER */
-		value = (value << 8) + (data[i] & 0xFF);
+		value = (db_expr_t)(((uintmax_t)value << 8) + (data[i] & 0xFF));
 
 	if (size < sizeof(db_expr_t) && is_signed
 	    && (value & ((db_expr_t)1 << (8*size - 1)))) {