diff --git a/frigate/util.py b/frigate/util.py
index 734ec6d31..e63f31387 100755
--- a/frigate/util.py
+++ b/frigate/util.py
@@ -926,9 +926,9 @@ def get_nvidia_gpu_stats() -> dict[str, str]:
         "--format=csv",
     ]
 
-    if ("CUDA_VISIBLE_DEVICES" in os.environ):
+    if ("CUDA_VISIBLE_DEVICES" in os.environ and os.environ["CUDA_VISIBLE_DEVICES"].isdigit()):
         nvidia_smi_command.extend(["--id", os.environ['CUDA_VISIBLE_DEVICES']])
-    elif ("NVIDIA_VISIBLE_DEVICES" in os.environ):
+    elif ("NVIDIA_VISIBLE_DEVICES" in os.environ and os.environ["NVIDIA_VISIBLE_DEVICES"].isdigit()):
         nvidia_smi_command.extend(["--id", os.environ['NVIDIA_VISIBLE_DEVICES']])
 
     p = sp.run(