diff --git a/base/sources/iron_gpu.c b/base/sources/iron_gpu.c
index ad3b3d9e..113a1655 100644
--- a/base/sources/iron_gpu.c
+++ b/base/sources/iron_gpu.c
@@ -17,6 +17,7 @@ uint32_t        constant_buffer_index              = 0;
 uint32_t        draw_calls                         = 0;
 uint32_t        draw_calls_last                    = 0;
 bool            gpu_in_use                         = false;
+bool            gpu_raytrace_multi                 = false;
 gpu_texture_t  *current_textures[GPU_MAX_TEXTURES] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
 gpu_texture_t  *current_render_targets[8]          = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
 uint32_t        current_render_targets_count       = 0;
diff --git a/base/sources/iron_gpu.h b/base/sources/iron_gpu.h
index 011db509..6d21e42f 100644
--- a/base/sources/iron_gpu.h
+++ b/base/sources/iron_gpu.h
@@ -254,6 +254,7 @@ uint32_t gpu_vertex_struct_size(gpu_vertex_structure_t *s);
 uint32_t gpu_texture_format_size(gpu_texture_format_t format);
 
 extern bool            gpu_in_use;
+extern bool            gpu_raytrace_multi;
 extern gpu_texture_t  *current_textures[GPU_MAX_TEXTURES];
 extern gpu_texture_t  *current_render_targets[8];
 extern uint32_t        current_render_targets_count;