diff --git a/src/DIRAC/Core/scripts/dirac_apptainer_exec.py b/src/DIRAC/Core/scripts/dirac_apptainer_exec.py
index 10bb41faf2d..7c54eac7f9b 100644
--- a/src/DIRAC/Core/scripts/dirac_apptainer_exec.py
+++ b/src/DIRAC/Core/scripts/dirac_apptainer_exec.py
@@ -27,8 +27,7 @@
 
 @Script()
 def main():
-    Script.registerArgument(" command: Command to execute inside the container")
-    command = Script.getPositionalArgs(group=True)
+    command = sys.argv[1]
 
     user_image = None
     Script.registerSwitch("i:", "image=", "   apptainer image to use")