diff --git a/vhpidirect/arrays/matrices/vunit_axis_vcs/run.py b/vhpidirect/arrays/matrices/vunit_axis_vcs/run.py
index 2c14116a..98e32674 100644
--- a/vhpidirect/arrays/matrices/vunit_axis_vcs/run.py
+++ b/vhpidirect/arrays/matrices/vunit_axis_vcs/run.py
@@ -9,7 +9,7 @@
 
 VU.add_library("lib").add_source_files([ROOT.parent / "pkg.vhd", ROOT / "src" / "*.vhd", ROOT / "*.vhd"])
 
-VU.set_compile_option("ghdl.flags", ["-frelaxed"])
+VU.set_compile_option("ghdl.a_flags", ["-frelaxed"])
 # Add the C wrapper to the elaboration of GHDL
 VU.set_sim_option("ghdl.elab_flags", ["-frelaxed", "-Wl," + str(ROOT.parent / "main.c")])