1 files changed, 2 insertions, 2 deletions
diff --git a/src/main.c b/src/main.c
index c15d98e..0472920 100644
--- a/src/main.c
+++ b/src/main.c
@@ -76,7 +76,7 @@ static void assert_no_single_quote(const char *str)
 	assert(strchr(str, ';') == NULL);
 }
 
-/* Write an id to *_ID, used by table_next_id. Write 0 if no id is found. */
+/* Write an id to *_ID, used by table_next_id. Write -1 if no id is found. */
 static int table_next_id_callback(void *_id, int, char **cols, char **)
 {
 	/* output has only one column, so our id is in COLS[0] */
@@ -84,7 +84,7 @@ static int table_next_id_callback(void *_id, int, char **cols, char **)
 	if (cols[0])
 		*id = atoi(cols[0]);
 	else
-		*id = 0;
+		*id = -1;
 	return 0;
 }