1 files changed, 7 insertions, 0 deletions
diff --git a/Source/Particles/MultiParticleContainer.cpp b/Source/Particles/MultiParticleContainer.cpp
index d8ccb36c6..c53ddceac 100644
--- a/Source/Particles/MultiParticleContainer.cpp
+++ b/Source/Particles/MultiParticleContainer.cpp
@@ -72,6 +72,13 @@ MultiParticleContainer::MultiParticleContainer (AmrCore* amr_core)
         pc_tmp->AddRealComp("uyold");
         pc_tmp->AddRealComp("uzold");
     }
+
+#ifdef WARPX_QED
+    //Add a tau field (optical depth) for all photon species
+    //for (int i = 0; i < nspecies; ++i)
+        //allcontainers[i]->AddRealComp("tau");
+#endif
+
 }
 
 void