diff --git a/intern/cycles/render/attribute.cpp b/intern/cycles/render/attribute.cpp
index 6e94459da55..b7de83d89c1 100644
--- a/intern/cycles/render/attribute.cpp
+++ b/intern/cycles/render/attribute.cpp
@@ -32,8 +32,9 @@ Attribute::~Attribute()
 	if(element == ATTR_ELEMENT_VOXEL) {
 		VoxelAttribute *voxel_data = data_voxel();
 
-		if(voxel_data)
+		if(voxel_data && voxel_data->slot != -1) {
 			voxel_data->manager->remove_image(voxel_data->slot);
+		}
 	}
 }