diff --git a/intern/cycles/scene/shader_nodes.cpp b/intern/cycles/scene/shader_nodes.cpp
index a04b4c5a1ff..304eab9ddbe 100644
--- a/intern/cycles/scene/shader_nodes.cpp
+++ b/intern/cycles/scene/shader_nodes.cpp
@@ -3372,14 +3372,23 @@ PrincipledHairBsdfNode::PrincipledHairBsdfNode() : BsdfBaseNode(get_node_type())
   closure = CLOSURE_BSDF_HAIR_HUANG_ID;
 }
 
-void PrincipledHairBsdfNode::attributes(Shader *shader, AttributeRequestSet *attributes)
+/* Treat hair as transparent if the hit is outside of the projected width. */
+bool PrincipledHairBsdfNode::has_surface_transparent()
 {
   if (model == NODE_PRINCIPLED_HAIR_HUANG) {
-    /* Make sure we have the normal for elliptical cross section tracking. */
     if (aspect_ratio != 1.0f || input("Aspect Ratio")->link) {
-      attributes->add(ATTR_STD_VERTEX_NORMAL);
+      return true;
     }
   }
+  return false;
+}
+
+void PrincipledHairBsdfNode::attributes(Shader *shader, AttributeRequestSet *attributes)
+{
+  if (has_surface_transparent()) {
+    /* Make sure we have the normal for elliptical cross section tracking. */
+    attributes->add(ATTR_STD_VERTEX_NORMAL);
+  }
 
   if (!input("Random")->link) {
     /* Enable retrieving Hair Info -> Random if Random isn't linked. */
diff --git a/intern/cycles/scene/shader_nodes.h b/intern/cycles/scene/shader_nodes.h
index c5643c2166a..cd437d3f885 100644
--- a/intern/cycles/scene/shader_nodes.h
+++ b/intern/cycles/scene/shader_nodes.h
@@ -851,6 +851,8 @@ class PrincipledHairBsdfNode : public BsdfBaseNode {
   {
     return ShaderNode::get_feature() | KERNEL_FEATURE_NODE_PRINCIPLED_HAIR;
   }
+
+  bool has_surface_transparent();
 };
 
 class HairBsdfNode : public BsdfNode {