diff --git a/src/acceleration_structure_pass.rs b/src/acceleration_structure_pass.rs
index b08156a..a9862f2 100644
--- a/src/acceleration_structure_pass.rs
+++ b/src/acceleration_structure_pass.rs
@@ -72,7 +72,7 @@ impl AccelerationStructurePassSampleBufferAttachmentDescriptor {
 }
 
 impl AccelerationStructurePassSampleBufferAttachmentDescriptorRef {
-    pub fn sample_buffer(&self) -> &CounterSampleBufferRef {
+    pub fn sample_buffer(&self) -> Option<&CounterSampleBufferRef> {
         unsafe { msg_send![self, sampleBuffer] }
     }
 
diff --git a/src/blitpass.rs b/src/blitpass.rs
index 290cadf..cb56186 100644
--- a/src/blitpass.rs
+++ b/src/blitpass.rs
@@ -66,7 +66,7 @@ impl BlitPassSampleBufferAttachmentDescriptor {
 }
 
 impl BlitPassSampleBufferAttachmentDescriptorRef {
-    pub fn sample_buffer(&self) -> &CounterSampleBufferRef {
+    pub fn sample_buffer(&self) -> Option<&CounterSampleBufferRef> {
         unsafe { msg_send![self, sampleBuffer] }
     }
 
diff --git a/src/computepass.rs b/src/computepass.rs
index bb21a72..d3173e3 100644
--- a/src/computepass.rs
+++ b/src/computepass.rs
@@ -71,7 +71,7 @@ impl ComputePassSampleBufferAttachmentDescriptor {
 }
 
 impl ComputePassSampleBufferAttachmentDescriptorRef {
-    pub fn sample_buffer(&self) -> &CounterSampleBufferRef {
+    pub fn sample_buffer(&self) -> Option<&CounterSampleBufferRef> {
         unsafe { msg_send![self, sampleBuffer] }
     }
 
diff --git a/src/renderpass.rs b/src/renderpass.rs
index f9aa50b..f23d934 100644
--- a/src/renderpass.rs
+++ b/src/renderpass.rs
@@ -266,7 +266,7 @@ impl RenderPassSampleBufferAttachmentDescriptor {
 }
 
 impl RenderPassSampleBufferAttachmentDescriptorRef {
-    pub fn sample_buffer(&self) -> &CounterSampleBufferRef {
+    pub fn sample_buffer(&self) -> Option<&CounterSampleBufferRef> {
         unsafe { msg_send![self, sampleBuffer] }
     }