diff --git a/Gems/Atom/Feature/Common/Assets/Shaders/PostProcessing/LuminanceHistogramGenerator.azsl b/Gems/Atom/Feature/Common/Assets/Shaders/PostProcessing/LuminanceHistogramGenerator.azsl
index 9d01a12fd6..05cc870eea 100644
--- a/Gems/Atom/Feature/Common/Assets/Shaders/PostProcessing/LuminanceHistogramGenerator.azsl
+++ b/Gems/Atom/Feature/Common/Assets/Shaders/PostProcessing/LuminanceHistogramGenerator.azsl
@@ -20,7 +20,7 @@
 ShaderResourceGroup PassSrg : SRG_PerPass
 {
     Texture2D<float4> m_inputTexture;
-    RWStructuredBuffer<uint> m_outputTexture;
+    RWBuffer<uint> m_outputTexture;
 }
 
 groupshared uint shared_histogramBins[NUM_HISTOGRAM_BINS];
diff --git a/Gems/Atom/Feature/Common/Assets/Shaders/PostProcessing/LuminanceHistogramGenerator.shader b/Gems/Atom/Feature/Common/Assets/Shaders/PostProcessing/LuminanceHistogramGenerator.shader
index f3dd11e11a..10f94cbff6 100644
--- a/Gems/Atom/Feature/Common/Assets/Shaders/PostProcessing/LuminanceHistogramGenerator.shader
+++ b/Gems/Atom/Feature/Common/Assets/Shaders/PostProcessing/LuminanceHistogramGenerator.shader
@@ -12,5 +12,6 @@
           "type": "Compute"
         }
       ]
-    }
+    },
+    "DisabledRHIBackends": ["metal"]
 }