diff --git a/src/init_mcfost.f90 b/src/init_mcfost.f90
index df00f5867..338e5ddb8 100644
--- a/src/init_mcfost.f90
+++ b/src/init_mcfost.f90
@@ -1765,9 +1765,12 @@ subroutine initialisation_mcfost()
      write (*,'(" Sequential code")')
   endif
 
-  if ((l_sym_ima).and.(abs(ang_disque) > 1e-6)) then
+  if ((l_sym_ima).and.(abs(ang_disque+90) > 1e-6)) then
      call warning("PA different from zero: removing image symetry")
      l_sym_ima=.false.
+     do imol=1,n_molecules
+        mol(imol)%l_sym_ima = .false.
+     enddo
   endif
 
   cmd = 'date'
diff --git a/src/read_param.f90 b/src/read_param.f90
index 083d3fc65..352203e51 100644
--- a/src/read_param.f90
+++ b/src/read_param.f90
@@ -463,7 +463,7 @@ subroutine read_para(para)
        mol(imol)%vmin_center_rt = (mol(imol)%vmin_center_rt - v_syst) * km_to_m ! Conversion en m.s-1
        mol(imol)%vmax_center_rt = (mol(imol)%vmax_center_rt - v_syst) * km_to_m ! Conversion en m.s-1
        mol(imol)%l_sym_ima = .false.
-       if (l_sym_ima) then
+       if (l_sym_ima) then ! we check for PA later as this can be changed by command line
           ! Molecular maps are only symmetrical if velocity range is symmetrical around vsyst
           if (abs(mol(imol)%vmax_center_rt + mol(imol)%vmin_center_rt) < 1e-5) mol(imol)%l_sym_ima = .true.
        endif