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-rw-r--r--src/diff.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/diff.c b/src/diff.c
index 59dc658eb..a47259e1a 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -3294,7 +3294,7 @@ f_diff_hlID(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
int col;
if (in_vim9script()
- && (check_for_string_or_number_arg(argvars,0) == FAIL
+ && (check_for_lnum_arg(argvars,0) == FAIL
|| check_for_number_arg(argvars, 1) == FAIL))
return;