diff --git a/tools/ctl/ctl.c b/tools/ctl/ctl.c
index c669349b68f9..b675a340401b 100644
--- a/tools/ctl/ctl.c
+++ b/tools/ctl/ctl.c
@@ -146,7 +146,7 @@ static int read_setup(struct ctl_data *ctl_data)
 	/* reading for ASCII CSV txt */
 	data_int_index = data_start_int_index;
 	while (fscanf(fh, "%u", &x) != EOF) {
-		if (n < n_max)
+		if (n < n_max - abi_size)
 			ctl_data->buffer[data_int_index] = x;
 
 		if (n > 0)