diff --git a/fuzzers/005-tilegrid/add_tdb.py b/fuzzers/005-tilegrid/add_tdb.py
index cd49a44..066be01 100644
--- a/fuzzers/005-tilegrid/add_tdb.py
+++ b/fuzzers/005-tilegrid/add_tdb.py
@@ -113,7 +113,7 @@
         ("gtp_common", 32, 101),
         ("gtp_channel", 32, 22),
         ("gtx_common", 32, 101),
-        ("gtx_channel", 32, 6),
+        ("gtx_channel", 32, 22),
         ("clb_int", int_frames, int_words),
         ("iob_int", int_frames, int_words),
         ("iob18_int", int_frames, int_words),
diff --git a/fuzzers/005-tilegrid/gtx_channel/Makefile b/fuzzers/005-tilegrid/gtx_channel/Makefile
index 29436b3..4144b95 100644
--- a/fuzzers/005-tilegrid/gtx_channel/Makefile
+++ b/fuzzers/005-tilegrid/gtx_channel/Makefile
@@ -6,5 +6,5 @@
 #
 # SPDX-License-Identifier: ISC
 N ?= 12
-GENERATE_ARGS?="--oneval 1 --design params.csv --dword 4 --auto-frame"
+GENERATE_ARGS?="--oneval 1 --design params.csv --dword 16 --dframe 1C"
 include ../fuzzaddr/common.mk