diff --git a/metis_l2_prep_uv.pro b/metis_l2_prep_uv.pro
index 2f28fc50c55cf2772527841496bad2008a3beae7..93fbe60119df16f1f22ddec2d83edbe45a6231ea 100644
--- a/metis_l2_prep_uv.pro
+++ b/metis_l2_prep_uv.pro
@@ -169,6 +169,7 @@ pro metis_l2_prep_uv
 
 	fxaddpar, primary_header, 'COMMENT', 'WARNING: UV radiometric calibration is still preliminary.'
 	fxaddpar, primary_header, 'COMMENT', 'Uncertainty matrix in the FITS extension is preliminary.'
+	fxaddpar, primary_header, 'COMMENT', 'Rotate CROTA degrees counter-clockwise to have Solar North up.'
 
 	for k = 0, n_elements(history) - 1 do $
 	fxaddpar, primary_header, 'HISTORY', history[k]
diff --git a/metis_l2_prep_vl_generic.pro b/metis_l2_prep_vl_generic.pro
index 738186b8e1f4e91056640115ebde9416da843d8f..c1a82e8a13719c4666ff523bf2b3fcdaba8928ca 100644
--- a/metis_l2_prep_vl_generic.pro
+++ b/metis_l2_prep_vl_generic.pro
@@ -200,7 +200,8 @@ pro metis_l2_prep_vl_generic
 	; update the comment and history keywords
 
 	fxaddpar, primary_header, 'COMMENT', 'Uncertainty matrix in the FITS extension is preliminary.'
-
+	fxaddpar, primary_header, 'COMMENT', 'Rotate CROTA degrees counter-clockwise to have Solar North up.'
+	
 	for k = 0, n_elements(history) - 1 do $
 	fxaddpar, primary_header, 'HISTORY', history[k]
 	fxaddpar, primary_header, 'HISTORY', 'L2 FITS file created on ' + date
diff --git a/metis_l2_prep_vl_polariz.pro b/metis_l2_prep_vl_polariz.pro
index 394aa21831966fad2e607ad32dc32a06fab90b14..89e510e4007a79105d95ea239ad0824578396b61 100755
--- a/metis_l2_prep_vl_polariz.pro
+++ b/metis_l2_prep_vl_polariz.pro
@@ -321,6 +321,7 @@ pro metis_l2_prep_vl_polariz
 	; update the comment and history keywords
 
 	fxaddpar, primary_header, 'COMMENT', 'Uncertainty matrix in the FITS extension is preliminary.'
+	fxaddpar, primary_header, 'COMMENT', 'Rotate CROTA degrees counter-clockwise to have Solar North up.'
 
 	history = ['Update WCS and solar ephemeris:', '  SKD version = ' + kernel_version]