diff --git a/src/softmagic.c b/src/softmagic.c

index 8d08cad..8262788 100644

--- a/src/softmagic.c

+++ b/src/softmagic.c

@@ -199,9 +199,9 @@ match(struct magic_set *ms, struct magic *magic, uint32_t nmagic,

 		if (file_check_mem(ms, ++cont_level) == -1)

 			return -1;

-		while (magic[magindex+1].cont_level != 0 &&

-		    ++magindex < nmagic) {

-			m = &magic[magindex];

+		while (magindex + 1 < nmagic &&

+			magic[magindex + 1].cont_level != 0) {

+			m = &magic[++magindex];

 			ms->line = m->lineno; /* for messages */

 			if (cont_level < m->cont_level)