diff --git a/Source/Initialization/WarpXInitData.cpp b/Source/Initialization/WarpXInitData.cpp
index 5140c86e5..6a32c40b8 100644
--- a/Source/Initialization/WarpXInitData.cpp
+++ b/Source/Initialization/WarpXInitData.cpp
@@ -408,6 +408,7 @@ WarpX::InitData ()
         }
         PostRestart();
         reduced_diags->InitData();
+        multi_diags->InitData();
     }
 
     ComputeMaxStep();