diff --git a/src/modules/moduleCollisions.f90 b/src/modules/moduleCollisions.f90
index d9a6ef2..36eca2e 100644
--- a/src/modules/moduleCollisions.f90
+++ b/src/modules/moduleCollisions.f90
@@ -123,16 +123,16 @@ MODULE moduleCollisions
     END FUNCTION randomDirectionVHS
 
     !Inits the interaction matrix
-    SUBROUTINE initInteractionMatrix(interactionMatrix)
+    SUBROUTINE initInteractionMatrix(matrix)
       USE moduleSpecies
       IMPLICIT NONE
 
-      TYPE(interactionsBinary), INTENT(inout), ALLOCATABLE:: interactionMatrix(:)
+      TYPE(interactionsBinary), INTENT(inout), ALLOCATABLE:: matrix(:)
 
       nCollPairs = (nSpecies*(nSpecies+1))/2
-      ALLOCATE(interactionMatrix(1:nCollPairs))
+      ALLOCATE(matrix(1:nCollPairs))
 
-      interactionMatrix(:)%amount = 0
+      matrix(:)%amount = 0
 
     END SUBROUTINE initInteractionMatrix