diff --git a/gpustack_runtime/deployer/docker.py b/gpustack_runtime/deployer/docker.py
index 56b51e8..2e0c652 100644
--- a/gpustack_runtime/deployer/docker.py
+++ b/gpustack_runtime/deployer/docker.py
@@ -910,8 +910,16 @@ def _create_containers(
                 create_options["working_dir"] = c.execution.working_dir
                 create_options["entrypoint"] = c.execution.command
                 create_options["command"] = c.execution.args
-                run_as_user = c.execution.run_as_user or workload.run_as_user
-                run_as_group = c.execution.run_as_group or workload.run_as_group
+                run_as_user = (
+                    c.execution.run_as_user
+                    if c.execution.run_as_user is not None
+                    else workload.run_as_user
+                )
+                run_as_group = (
+                    c.execution.run_as_group
+                    if c.execution.run_as_group is not None
+                    else workload.run_as_group
+                )
                 if run_as_user is not None:
                     create_options["user"] = run_as_user
                     if run_as_group is not None:
diff --git a/gpustack_runtime/deployer/podman.py b/gpustack_runtime/deployer/podman.py
index 075d234..12eeb75 100644
--- a/gpustack_runtime/deployer/podman.py
+++ b/gpustack_runtime/deployer/podman.py
@@ -911,8 +911,16 @@ def _create_containers(
                 create_options["working_dir"] = c.execution.working_dir
                 create_options["entrypoint"] = c.execution.command
                 create_options["command"] = c.execution.args
-                run_as_user = c.execution.run_as_user or workload.run_as_user
-                run_as_group = c.execution.run_as_group or workload.run_as_group
+                run_as_user = (
+                    c.execution.run_as_user
+                    if c.execution.run_as_user is not None
+                    else workload.run_as_user
+                )
+                run_as_group = (
+                    c.execution.run_as_group
+                    if c.execution.run_as_group is not None
+                    else workload.run_as_group
+                )
                 if run_as_user is not None:
                     create_options["user"] = run_as_user
                     if run_as_group is not None: