diff --git a/src/shader_recompiler/backend/glasm/emit_glasm_context_get_set.cpp b/src/shader_recompiler/backend/glasm/emit_glasm_context_get_set.cpp
index c7d7d5fefb..75c89ebd02 100644
--- a/src/shader_recompiler/backend/glasm/emit_glasm_context_get_set.cpp
+++ b/src/shader_recompiler/backend/glasm/emit_glasm_context_get_set.cpp
@@ -406,6 +406,10 @@ void EmitInvocationInfo(EmitContext& ctx, IR::Inst& inst) {
     case Stage::TessellationEval:
         ctx.Add("SHL.U {}.x,primitive.vertexcount,16;", inst);
         break;
+    case Stage::Geometry:
+        ctx.Add("SHL.U {}.x,{},16;", inst,
+            InputTopologyVertices::vertices(ctx.runtime_info.input_topology));
+        break;
     default:
         LOG_WARNING(Shader, "(STUBBED) called");
         ctx.Add("MOV.S {}.x,0x00ff0000;", inst);
diff --git a/src/shader_recompiler/backend/glasm/glasm_emit_context.h b/src/shader_recompiler/backend/glasm/glasm_emit_context.h
index a81d64a9e4..b4d66ea559 100644
--- a/src/shader_recompiler/backend/glasm/glasm_emit_context.h
+++ b/src/shader_recompiler/backend/glasm/glasm_emit_context.h
@@ -11,6 +11,7 @@
 
 #include "shader_recompiler/backend/glasm/reg_alloc.h"
 #include "shader_recompiler/stage.h"
+#include "shader_recompiler/runtime_info.h"
 
 namespace Shader {
 struct Info;
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
index 2e369ed723..35d99bad3e 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
@@ -426,6 +426,10 @@ void EmitInvocationInfo(EmitContext& ctx, IR::Inst& inst) {
     case Stage::TessellationEval:
         ctx.AddU32("{}=uint(gl_PatchVerticesIn)<<16;", inst);
         break;
+    case Stage::Geometry:
+        ctx.AddU32("{}=uint({}<<16);", inst,
+            InputTopologyVertices::vertices(ctx.runtime_info.input_topology));
+        break;
     default:
         LOG_WARNING(Shader, "(STUBBED) called");
         ctx.AddU32("{}=uint(0x00ff0000);", inst);
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
index feca5105f9..2e7643fe9a 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
@@ -549,6 +549,8 @@ Id EmitInvocationInfo(EmitContext& ctx) {
     case Stage::TessellationEval:
         return ctx.OpShiftLeftLogical(ctx.U32[1], ctx.OpLoad(ctx.U32[1], ctx.patch_vertices_in),
                                       ctx.Const(16u));
+    case Stage::Geometry:
+        return ctx.Const(InputTopologyVertices::vertices(ctx.runtime_info.input_topology) << 16);
     default:
         LOG_WARNING(Shader, "(STUBBED) called");
         return ctx.Const(0x00ff0000u);
diff --git a/src/shader_recompiler/runtime_info.h b/src/shader_recompiler/runtime_info.h
index 619c0b1387..dc54d932a6 100644
--- a/src/shader_recompiler/runtime_info.h
+++ b/src/shader_recompiler/runtime_info.h
@@ -30,6 +30,24 @@ enum class InputTopology {
     TrianglesAdjacency,
 };
 
+struct InputTopologyVertices {
+    static u32 vertices(InputTopology input_topology) {
+        switch (input_topology) {
+        case InputTopology::Lines:
+            return 2;
+        case InputTopology::LinesAdjacency:
+            return 4;
+        case InputTopology::Triangles:
+            return 3;
+        case InputTopology::TrianglesAdjacency:
+            return 6;
+        case InputTopology::Points:
+        default:
+            return 1;
+        }
+    }
+};
+
 enum class CompareFunction {
     Never,
     Less,