diff --git a/ggml/src/ggml-metal/ggml-metal-ops.cpp b/ggml/src/ggml-metal/ggml-metal-ops.cpp
index bc8b3c8d4..c5c4ec46b 100644
--- a/ggml/src/ggml-metal/ggml-metal-ops.cpp
+++ b/ggml/src/ggml-metal/ggml-metal-ops.cpp
@@ -917,7 +917,7 @@ int ggml_metal_op_glu(ggml_metal_op_t ctx, int idx) {
 
     const int64_t nrows = ggml_nrows(op->src[0]);
 
-    const int32_t nth = std::min(ggml_metal_pipeline_max_theads_per_threadgroup(pipeline), ne00/2);
+    const int32_t nth = std::max(1, std::min(ggml_metal_pipeline_max_theads_per_threadgroup(pipeline), ne00/2));
 
     ggml_metal_encoder_set_pipeline(enc, pipeline);
     ggml_metal_encoder_set_bytes   (enc, &args, sizeof(args), 0);