diff --git a/backends/gpu/metal/kernel_ops.cpp b/backends/gpu/metal/kernel_ops.cpp
index fb8270e..8587931 100644
--- a/backends/gpu/metal/kernel_ops.cpp
+++ b/backends/gpu/metal/kernel_ops.cpp
@@ -44,6 +44,7 @@ MTL::ComputeCommandEncoder* MetalKops::prepare(
         throw std::runtime_error("Failed to create compute pipeline state");
     }
     encoder->setComputePipelineState(pipelineState);
+    pipelineState->release();
     return encoder;
 }