diff --git a/src/maths/KLU/klusmp.c b/src/maths/KLU/klusmp.c
index 6fefebc09..2acae11cd 100644
--- a/src/maths/KLU/klusmp.c
+++ b/src/maths/KLU/klusmp.c
@@ -136,6 +136,7 @@ void SMPconvertCOOtoCSC (SMPmatrix *Matrix)
         MatrixCOO [i].group = 0 ;
         current = temp ;
         temp = temp->next ;
+        free (current->pointer) ;
         free (current) ;
         current = NULL ;
         i++ ;