diff --git a/src/dawn/native/metal/RenderPipelineMTL.mm b/src/dawn/native/metal/RenderPipelineMTL.mm
index 0de8589..cc620a7 100644
--- a/src/dawn/native/metal/RenderPipelineMTL.mm
+++ b/src/dawn/native/metal/RenderPipelineMTL.mm
@@ -417,7 +417,7 @@
     }
 
     descriptorMTL.inputPrimitiveTopology = MTLInputPrimitiveTopology(GetPrimitiveTopology());
-    descriptorMTL.sampleCount = GetSampleCount();
+    descriptorMTL.rasterSampleCount = GetSampleCount();
     descriptorMTL.alphaToCoverageEnabled = IsAlphaToCoverageEnabled();
 
     NSError* error = nullptr;