diff --git a/src/modules/moduleInject.f90 b/src/modules/moduleInject.f90
index b6fc64b..000823e 100644
--- a/src/modules/moduleInject.f90
+++ b/src/modules/moduleInject.f90
@@ -199,17 +199,21 @@ MODULE moduleInject
 
         END DO
 
+        self%nParticles = SUM(self%particlesPerEdge)
+
       ELSE
         ! No particles assigned per edge, use the species weight
         self%weightPerEdge = self%species%weight
         DO et = 1, self%nEdges
-          self%particlesPerEdge(et) = FLOOR(fluxPerStep*mesh%edges(self%edges(et))%obj%surface /self%species%weight)
-
+          self%particlesPerEdge(et) = max(1,FLOOR(fluxPerStep*mesh%edges(self%edges(et))%obj%surface / self%species%weight))
         END DO
 
-      END IF
+        self%nParticles = SUM(self%particlesPerEdge)
 
-      self%nParticles = SUM(self%particlesPerEdge)
+        !Rescale weight to match flux
+        self%weightPerEdge = fluxPerStep * self%surface / (real(self%nParticles))
+
+      END IF
 
       !Scale particles for different species steps
       IF (self%nParticles == 0) CALL criticalError("The number of particles for inject is 0.", 'initInject')