diff --git a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/ConeInjection/ConeInjection.H b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/ConeInjection/ConeInjection.H
index 19d2731bd9..e8c282ffbe 100644
--- a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/ConeInjection/ConeInjection.H
+++ b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/ConeInjection/ConeInjection.H
@@ -121,7 +121,7 @@ protected:
         //- Number of parcels to introduce over the time step relative to SOI
         virtual label parcelsToInject(const scalar time0, const scalar time1);
 
-        //- Number of parcels to introduce over the time step relative to SOI
+        //- Volume of parcels to introduce over the time step relative to SOI
         virtual scalar volumeToInject(const scalar time0, const scalar time1);
 
 
diff --git a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/ConeInjectionMP/ConeInjectionMP.H b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/ConeInjectionMP/ConeInjectionMP.H
index bfbbd70152..47b19de6d3 100644
--- a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/ConeInjectionMP/ConeInjectionMP.H
+++ b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/ConeInjectionMP/ConeInjectionMP.H
@@ -128,10 +128,10 @@ protected:
 
     // Protected Member Functions
 
-        //- Number of parcels to introduce over the time step
+        //- Number of parcels to introduce over the time step relative to SOI
         virtual label parcelsToInject(const scalar time0, const scalar time1);
 
-        //- Number of parcels to introduce over the time step
+        //- Volume of parcels to introduce over the time step relative to SOI
         virtual scalar volumeToInject(const scalar time0, const scalar time1);
 
 
diff --git a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModel.C b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModel.C
index 72b891079a..20962a38a7 100644
--- a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModel.C
+++ b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModel.C
@@ -91,7 +91,7 @@ Foam::label Foam::InjectionModel<CloudType>::parcelsToInject
 (
     const scalar time0,
     const scalar time1
-) const
+)
 {
     notImplemented
     (
@@ -111,7 +111,7 @@ Foam::scalar Foam::InjectionModel<CloudType>::volumeToInject
 (
     const scalar time0,
     const scalar time1
-) const
+)
 {
     notImplemented
     (
@@ -162,10 +162,10 @@ void Foam::InjectionModel<CloudType>::prepareForNextTimeStep
     scalar t1 = time - SOI_;
 
     // Number of parcels to inject
-    newParcels = parcelsToInject(t0, t1);
+    newParcels = this->parcelsToInject(t0, t1);
 
     // Volume of parcels to inject
-    newVolume = volumeToInject(t0, t1);
+    newVolume = this->volumeToInject(t0, t1);
 
     // Hold previous time if no parcels, but non-zero volume fraction
     if ((newParcels == 0) && (newVolume > 0.0))
@@ -486,7 +486,7 @@ template<class CloudType>
 template<class TrackData>
 void Foam::InjectionModel<CloudType>::inject(TrackData& td)
 {
-    if (this->active())
+    if (!this->active())
     {
         return;
     }
diff --git a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModel.H b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModel.H
index 86fffe68de..23f8f2f762 100644
--- a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModel.H
+++ b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/InjectionModel/InjectionModel.H
@@ -143,18 +143,10 @@ protected:
     // Protected Member Functions
 
         //- Number of parcels to introduce over the time step relative to SOI
-        virtual label parcelsToInject
-        (
-            const scalar time0,
-            const scalar time1
-        ) const;
+        virtual label parcelsToInject(const scalar time0, const scalar time1);
 
         //- Volume of parcels to introduce over the time step relative to SOI
-        virtual scalar volumeToInject
-        (
-            const scalar time0,
-            const scalar time1
-        ) const;
+        virtual scalar volumeToInject(const scalar time0, const scalar time1);
 
         //- Additional flag to identify whether or not injection of parcelI is
         //  permitted
diff --git a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/NoInjection/NoInjection.H b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/NoInjection/NoInjection.H
index 4a33d23054..5dc73b8342 100644
--- a/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/NoInjection/NoInjection.H
+++ b/src/lagrangian/intermediate/submodels/Kinematic/InjectionModel/NoInjection/NoInjection.H
@@ -56,10 +56,10 @@ protected:
     // Protected Member Functions
 
         //- Number of parcels to introduce over the time step relative to SOI
-        virtual label parcelsToInject(const scalar, const scalar);
+        virtual label parcelsToInject(const scalar time0, const scalar time1);
 
         //- Volume of parcels to introduce over the time step relative to SOI
-        virtual scalar volumeToInject(const scalar, const scalar);
+        virtual scalar volumeToInject(const scalar time0, const scalar time1);
 
 
 public: