1 files changed, 3 insertions, 1 deletions
diff --git a/toke.c b/toke.c
index 844b9829b3..2518e54854 100644
--- a/toke.c
+++ b/toke.c
@@ -976,8 +976,10 @@ scan_const(char *start)
 			count--;
 		    regparse++;
 		}
-		if (*regparse != ')')
+		if (*regparse != ')') {
+		    regparse--;		/* Leave one char for continuation. */
 		    yyerror("Sequence (?{...}) not terminated or not {}-balanced");
+		}
 		while (s < regparse)
 		    *d++ = *s++;
 	    }