diff --git a/pungi/wrappers/lorax.py b/pungi/wrappers/lorax.py
index 7a0ac1b8..6e164c66 100644
--- a/pungi/wrappers/lorax.py
+++ b/pungi/wrappers/lorax.py
@@ -100,7 +100,9 @@ class LoraxWrapper(object):
             cmd.append("--squashfs-only")
 
         if configuration_file:
-            cmd.append("-c=%s" % configuration_file)
+            # Note, at the moment Lorax does not accept --config=%s
+            cmd.append("--config")
+            cmd.append(configuration_file)
         output_dir = os.path.abspath(output_dir)
         cmd.append(output_dir)
 
diff --git a/tests/test_lorax_wrapper.py b/tests/test_lorax_wrapper.py
index d4fc7e85..3eb6f535 100644
--- a/tests/test_lorax_wrapper.py
+++ b/tests/test_lorax_wrapper.py
@@ -88,7 +88,8 @@ class LoraxWrapperTest(unittest.TestCase):
                 "--dracut-arg=--foo",
                 "--dracut-arg=bar",
                 "--squashfs-only",
-                "-c=/storage/RHEL-7.8-20200731.n.0/"
+                "--config",
+                "/storage/RHEL-7.8-20200731.n.0/"
                 + "logs/x86_64/buildinstall-Server-logs/lorax.conf",
                 "/mnt/output_dir",
             ],