diff --git a/src/igl/metal/Framebuffer.h b/src/igl/metal/Framebuffer.h
index e56e0823ea..badbeed9f8 100644
--- a/src/igl/metal/Framebuffer.h
+++ b/src/igl/metal/Framebuffer.h
@@ -13,9 +13,6 @@
 
 namespace igl {
 
-class ICommandQueue;
-class ITexture;
-
 namespace metal {
 
 class Framebuffer : public IFramebuffer {
diff --git a/src/igl/metal/PlatformDevice.h b/src/igl/metal/PlatformDevice.h
index f71efa31a9..750545dd63 100644
--- a/src/igl/metal/PlatformDevice.h
+++ b/src/igl/metal/PlatformDevice.h
@@ -19,14 +19,12 @@
 
 namespace igl {
 
-struct SamplerStateDesc;
 struct FramebufferDesc;
 
 namespace metal {
 
 class Device;
 class Framebuffer;
-class SamplerState;
 
 class PlatformDevice final : public IPlatformDevice {
  public:
diff --git a/src/igl/metal/RenderCommandEncoder.h b/src/igl/metal/RenderCommandEncoder.h
index cedb06c4a9..f7fbb42cdf 100644
--- a/src/igl/metal/RenderCommandEncoder.h
+++ b/src/igl/metal/RenderCommandEncoder.h
@@ -15,7 +15,6 @@
 #include <igl/metal/CommandBuffer.h>
 
 namespace igl::metal {
-class Buffer;
 class Device;
 
 class RenderCommandEncoder final : public IRenderCommandEncoder {