diff --git a/com.unity.render-pipelines.high-definition/CHANGELOG.md b/com.unity.render-pipelines.high-definition/CHANGELOG.md
index b807e81c3aa..d29b7633109 100644
--- a/com.unity.render-pipelines.high-definition/CHANGELOG.md
+++ b/com.unity.render-pipelines.high-definition/CHANGELOG.md
@@ -166,6 +166,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed issue with RAS build fail when LOD was missing a renderer
 - Fixed an issue where sometime a docked lookdev could be rendered at zero size and break.
 - Fixed an issue where runtime debug window UI would leak game objects.
+- Fixed NaNs when denoising pixels where the dot product between normal and view direction is near zero (case 1329624).
 
 ### Changed
 - Changed Window/Render Pipeline/HD Render Pipeline Wizard to Window/Rendering/HDRP Wizard
diff --git a/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/Raytracing/Shaders/Denoising/DenoisingUtils.hlsl b/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/Raytracing/Shaders/Denoising/DenoisingUtils.hlsl
index f9acfbac2b9..14fac1340f9 100644
--- a/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/Raytracing/Shaders/Denoising/DenoisingUtils.hlsl
+++ b/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/Raytracing/Shaders/Denoising/DenoisingUtils.hlsl
@@ -1,12 +1,13 @@
 
 #define MAX_REPROJECTION_DISTANCE 0.1
 #define MAX_PIXEL_TOLERANCE 4
+#define PROJECTION_EPSILON 0.000001
 
 float ComputeMaxReprojectionWorldRadius(float3 positionWS, float3 normalWS, float pixelSpreadAngleTangent, float maxDistance, float pixelTolerance)
 {
     const float3 viewWS = GetWorldSpaceNormalizeViewDir(positionWS);
     float parallelPixelFootPrint = pixelSpreadAngleTangent * length(positionWS);
-    float realPixelFootPrint = parallelPixelFootPrint / abs(dot(normalWS, viewWS));
+    float realPixelFootPrint = parallelPixelFootPrint / max(abs(dot(normalWS, viewWS)), PROJECTION_EPSILON);
     return max(maxDistance, realPixelFootPrint * pixelTolerance);
 }