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-rw-r--r--src/regexp_bt.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/regexp_bt.c b/src/regexp_bt.c
index 9da345f4e2..5452dda0f6 100644
--- a/src/regexp_bt.c
+++ b/src/regexp_bt.c
@@ -5570,7 +5570,7 @@ regprop(char_u *op)
case ZREF + 7:
case ZREF + 8:
case ZREF + 9:
- bulen += sprintf(buf + buflen, "ZREF%d", OP(op) - ZREF);
+ buflen += sprintf(buf + buflen, "ZREF%d", OP(op) - ZREF);
p = NULL;
break;
#endif