--- src/sort.c
+++ src/sort.c
@@ -1838,7 +1838,8 @@
 	     if (MBLENGTH == (size_t)-2 || MBLENGTH == (size_t)-1)	\
 	       STATE = state_bak;					\
 	     if (!ignore)						\
-	       COPY[NEW_LEN++] = TEXT[i++];				\
+	       COPY[NEW_LEN++] = TEXT[i];				\
+	     i++;							\
 	     continue;							\
 	   }								\
 	 								\