diff --git a/src/regexp_nfa.c b/src/regexp_nfa.c
index c7c6598..9310008 100644
--- a/src/regexp_nfa.c
+++ b/src/regexp_nfa.c
@@ -3294,7 +3294,7 @@
 		     * (no preceding character). */
 		    len += mb_char2len(mc);
 		}
-		if (ireg_icombine)
+		if (ireg_icombine && len == 0)
 		{
 		    /* If \Z was present, then ignore composing characters.
 		     * When ignoring the base character this always matches. */