diff --git a/src/calibration.jl b/src/calibration.jl
index 831f9b2df26159724da1d7955ba01a4a03c7ebcb..6fc3fe791d12bbb63fbaeadfe9755d3bb399c62b 100644
--- a/src/calibration.jl
+++ b/src/calibration.jl
@@ -12,14 +12,13 @@ function calibrate(det::Detector, hits)
         dir = det[dom_id][channel_id].dir
         t0 = det[dom_id][channel_id].tâ‚€
         t = hit.t + t0
-        du = det[dom_id].location.string
+        string = det[dom_id].location.string
         floor = det[dom_id].location.floor
         trigger_mask = has_trigger_mask ? hit.trigger_mask : 0
         c_hit = XCalibratedHit(
             dom_id, channel_id, t, tot, trigger_mask,
             pos, dir, t0,
-            du, floor,
-            Multiplicity(0, 0)
+            string, floor
         )
         push!(calibrated_hits, c_hit)
     end
diff --git a/src/types.jl b/src/types.jl
index c88c2fbfa1f5defc4675d6cd92f25832dac77066..55ab0ee62392cd655b655a0b63086fa80fa0c0e5 100644
--- a/src/types.jl
+++ b/src/types.jl
@@ -71,11 +71,6 @@ struct TriggeredHit <: AbstractDAQHit
     trigger_mask::UInt64
 end
 
-mutable struct Multiplicity
-    count::Int32
-    id::Int64
-end
-
 
 struct XCalibratedHit <: AbstractCalibratedHit
     dom_id::UInt32
@@ -86,9 +81,8 @@ struct XCalibratedHit <: AbstractCalibratedHit
     pos::Position{Float64}
     dir::Direction{Float64}
     t0::Float64
-    du::UInt8
+    string::UInt8
     floor::UInt8
-    multiplicity::Multiplicity
 end
 
 """