diff --git a/src/tools.f90 b/src/tools.f90
index 293f32181..6d12c9e70 100644
--- a/src/tools.f90
+++ b/src/tools.f90
@@ -494,7 +494,7 @@ subroutine init_restart_adios2()
     use variables, only : numscalar
     use param, only : ilmn, nrhotime, ntime
     use var, only : itimescheme, iibm
-    use mhd, only : mhd_active
+    use mhd, only : mhd_active, mhd_equation
     
     implicit none