diff --git a/src/modules/init/moduleInput.f90 b/src/modules/init/moduleInput.f90
index 6f89660..c5be312 100644
--- a/src/modules/init/moduleInput.f90
+++ b/src/modules/init/moduleInput.f90
@@ -901,7 +901,12 @@ MODULE moduleInput
               call quasiNeutrality_init(bound, s_incident)
 
             CASE('outflowAdaptive')
-              call outflowAdaptive_init(bound)
+              call config%get(object // '.incident', speciesName, found)
+              if (.not. found) call criticalError("Incident species name not found for quasiNeutrality boundary model", 'readBoundary')
+
+              s_incident = speciesName2Index(speciesName)
+
+              call outflowAdaptive_init(bound, s_incident)
 
             CASE DEFAULT
               CALL criticalError('Boundary type ' // bType // ' undefined', 'readBoundary')
diff --git a/src/modules/mesh/moduleMesh.f90 b/src/modules/mesh/moduleMesh.f90
index b8ae18d..de6fb54 100644
--- a/src/modules/mesh/moduleMesh.f90
+++ b/src/modules/mesh/moduleMesh.f90
@@ -688,9 +688,9 @@ MODULE moduleMesh
 
     end subroutine quasiNeutrality_init
 
-    module subroutine outflowAdaptive_init(boundary)!, s_incident)
+    module subroutine outflowAdaptive_init(boundary, s_incident)
       class(boundaryParticleGeneric), allocatable, intent(inout):: boundary
-      ! integer, intent(in):: s_incident
+      integer, intent(in):: s_incident
 
     end subroutine outflowAdaptive_init
 
diff --git a/src/modules/mesh/moduleMesh@boundaryParticle.f90 b/src/modules/mesh/moduleMesh@boundaryParticle.f90
index 011c9b8..ce5e1f5 100644
--- a/src/modules/mesh/moduleMesh@boundaryParticle.f90
+++ b/src/modules/mesh/moduleMesh@boundaryParticle.f90
@@ -491,10 +491,11 @@ submodule(moduleMesh) boundaryParticle
     ! outflowAdaptive
     ! Adjust the reflection coefficient of the boundary to maintain a quasi-neutral outflow
     ! Init
-    subroutine outflowAdaptive_init(boundary)
+    subroutine outflowAdaptive_init(boundary, s_incident)
       implicit none
 
       class(boundaryParticleGeneric), allocatable, intent(inout):: boundary
+      integer, intent(in):: s_incident
 
       allocate(boundaryOutflowAdaptive:: boundary)
       
@@ -502,7 +503,7 @@ submodule(moduleMesh) boundaryParticle
       type is(boundaryOutflowAdaptive)
         allocate(boundary%edges(0))
 
-        boundary%s_incident = 1 !TODO Make this an input parameter
+        boundary%s_incident = s_incident
 
         boundary%update => outflowAdaptive_update
         boundary%print  => outflowAdaptive_print