diff --git a/src/cmfd_slepc_solver.F90 b/src/cmfd_slepc_solver.F90
index fb32c2e1ad..4b5ba7d58e 100644
--- a/src/cmfd_slepc_solver.F90
+++ b/src/cmfd_slepc_solver.F90
@@ -1,6 +1,6 @@
 module cmfd_slepc_solver
 
-#ifdef PETSC
+#ifdef SLEPC
   use cmfd_loss_operator, only: loss_operator, init_M_operator, &
                                 build_loss_matrix, destroy_M_operator
   use cmfd_prod_operator, only: prod_operator, init_F_operator, &