1 files changed, 4 insertions, 0 deletions

diff --git a/src/shader_recompiler/backend/glasm/glasm_emit_context.cpp b/src/shader_recompiler/backend/glasm/glasm_emit_context.cpp
index 89603c1c4..333a91cc5 100644
--- a/src/shader_recompiler/backend/glasm/glasm_emit_context.cpp
+++ b/src/shader_recompiler/backend/glasm/glasm_emit_context.cpp
@@ -95,6 +95,10 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
     if (info.uses_invocation_id) {
         Add("ATTRIB primitive_invocation=primitive.invocation;");
     }
+    if (info.uses_invocation_info &&
+        (stage == Stage::TessellationControl || stage == Stage::TessellationEval)) {
+        Add("ATTRIB primitive_vertexcount = primitive.vertexcount;");
+    }
     if (info.stores_tess_level_outer) {
         Add("OUTPUT result_patch_tessouter[]={{result.patch.tessouter[0..3]}};");
     }