diff --git a/src/video_core/primitive_assembly.cpp b/src/video_core/primitive_assembly.cpp
index 182a697720..60b0af0594 100644
--- a/src/video_core/primitive_assembly.cpp
+++ b/src/video_core/primitive_assembly.cpp
@@ -15,7 +15,7 @@ PrimitiveAssembler<VertexType>::PrimitiveAssembler(PipelineRegs::TriangleTopolog
 
 template <typename VertexType>
 void PrimitiveAssembler<VertexType>::SubmitVertex(const VertexType& vtx,
-                                                  TriangleHandler triangle_handler) {
+                                                  const TriangleHandler& triangle_handler) {
     switch (topology) {
     case PipelineRegs::TriangleTopology::List:
     case PipelineRegs::TriangleTopology::Shader:
diff --git a/src/video_core/primitive_assembly.h b/src/video_core/primitive_assembly.h
index f453ac82ee..c650646db2 100644
--- a/src/video_core/primitive_assembly.h
+++ b/src/video_core/primitive_assembly.h
@@ -29,7 +29,7 @@ struct PrimitiveAssembler {
      * NOTE: We could specify the triangle handler in the constructor, but this way we can
      * keep event and handler code next to each other.
      */
-    void SubmitVertex(const VertexType& vtx, TriangleHandler triangle_handler);
+    void SubmitVertex(const VertexType& vtx, const TriangleHandler& triangle_handler);
 
     /**
      * Invert the vertex order of the next triangle. Called by geometry shader emitter.