diff --git a/extensions/llamacpp-extension/src/index.ts b/extensions/llamacpp-extension/src/index.ts
index 76912c5e3..13322bbe5 100644
--- a/extensions/llamacpp-extension/src/index.ts
+++ b/extensions/llamacpp-extension/src/index.ts
@@ -1182,7 +1182,9 @@ export default class llamacpp_extension extends AIEngine {
 
     // Add remaining options from the interface
     if (cfg.chat_template) args.push('--chat-template', cfg.chat_template)
-    args.push('-ngl', String(cfg.n_gpu_layers > 0 ? cfg.n_gpu_layers : 100))
+    const gpu_layers =
+      parseInt(String(cfg.n_gpu_layers)) >= 0 ? cfg.n_gpu_layers : 100
+    args.push('-ngl', String(gpu_layers))
     if (cfg.threads > 0) args.push('--threads', String(cfg.threads))
     if (cfg.threads_batch > 0)
       args.push('--threads-batch', String(cfg.threads_batch))