diff --git a/dlls/wined3d/shader.c b/dlls/wined3d/shader.c
index f7ecda3bf85..a4177bc2df9 100644
--- a/dlls/wined3d/shader.c
+++ b/dlls/wined3d/shader.c
@@ -1751,6 +1751,10 @@ static void shader_dump_register(struct wined3d_string_buffer *buffer,
             shader_addline(buffer, "g");
             break;
 
+        case WINED3DSPR_LOCALTHREADINDEX:
+            shader_addline(buffer, "vThreadIDInGroupFlattened");
+            break;
+
         default:
             shader_addline(buffer, "<unhandled_rtype(%#x)>", reg->type);
             break;
diff --git a/dlls/wined3d/shader_sm4.c b/dlls/wined3d/shader_sm4.c
index 893c3315587..ada369bdc3e 100644
--- a/dlls/wined3d/shader_sm4.c
+++ b/dlls/wined3d/shader_sm4.c
@@ -251,6 +251,7 @@ enum wined3d_sm4_register_type
     WINED3D_SM5_RT_DOMAIN_LOCATION         = 0x1c,
     WINED3D_SM5_RT_UAV                     = 0x1e,
     WINED3D_SM5_RT_SHARED_MEMORY           = 0x1f,
+    WINED3D_SM5_RT_LOCAL_THREAD_INDEX      = 0x24,
 };
 
 enum wined3d_sm4_output_primitive_type
@@ -818,6 +819,11 @@ static const enum wined3d_shader_register_type register_type_table[] =
     /* UNKNOWN */                                ~0u,
     /* WINED3D_SM5_RT_UAV */                     WINED3DSPR_UAV,
     /* WINED3D_SM5_RT_SHARED_MEMORY */           WINED3DSPR_GROUPSHAREDMEM,
+    /* UNKNOWN */                                ~0u,
+    /* UNKNOWN */                                ~0u,
+    /* UNKNOWN */                                ~0u,
+    /* UNKNOWN */                                ~0u,
+    /* WINED3D_SM5_RT_LOCAL_THREAD_INDEX */      WINED3DSPR_LOCALTHREADINDEX,
 };
 
 static const struct wined3d_sm4_opcode_info *get_opcode_info(enum wined3d_sm4_opcode opcode)
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index d573cfce0e2..e7c626d437f 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -388,6 +388,7 @@ enum wined3d_shader_register_type
     WINED3DSPR_PATCHCONST,
     WINED3DSPR_TESSCOORD,
     WINED3DSPR_GROUPSHAREDMEM,
+    WINED3DSPR_LOCALTHREADINDEX,
 };
 
 enum wined3d_data_type