diff --git a/htdocs/core/js/lib_head.js.php b/htdocs/core/js/lib_head.js.php
index 37c0bfc6744..5afdab071a1 100644
--- a/htdocs/core/js/lib_head.js.php
+++ b/htdocs/core/js/lib_head.js.php
@@ -1048,9 +1048,11 @@ function document_preview(file, type, title)
 
 		optionsbuttons = {}
 		if (mode == 'image' && showOriginalSizeButton)
-		{
+		{	
+			var curRot = 0;
 			optionsbuttons = {
 				"<?php echo dol_escape_js($langs->transnoentitiesnoconv("OriginalSize")); ?>": function() { console.log("Click on original size"); jQuery(".ui-dialog-content.ui-widget-content > object").css({ "max-height": "none" }); },
+				"<?php echo dol_escape_js($langs->transnoentitiesnoconv("RotateImage")); ?>": function() { curRot += 90; jQuery(".ui-dialog-content.ui-widget-content > object").css("transform","rotate(" + curRot + "deg)"); },
 				"<?php echo dol_escape_js($langs->transnoentitiesnoconv("CloseWindow")); ?>": function() { $( this ).dialog( "close" ); }
 				};
 		}
diff --git a/htdocs/langs/en_US/main.lang b/htdocs/langs/en_US/main.lang
index 70e9e6e46c3..380f654f462 100644
--- a/htdocs/langs/en_US/main.lang
+++ b/htdocs/langs/en_US/main.lang
@@ -556,6 +556,7 @@ Unknown=Unknown
 General=General
 Size=Size
 OriginalSize=Original size
+RotateImage=Rotate 90°
 Received=Received
 Paid=Paid
 Topic=Subject
diff --git a/htdocs/langs/fr_FR/main.lang b/htdocs/langs/fr_FR/main.lang
index ae82ee55924..cda7dbf6789 100644
--- a/htdocs/langs/fr_FR/main.lang
+++ b/htdocs/langs/fr_FR/main.lang
@@ -555,6 +555,7 @@ Unknown=Inconnu
 General=Général
 Size=Taille
 OriginalSize=Taille d'origine
+RotateImage=Rotation 90°
 Received=Reçu
 Paid=Payé
 Topic=Sujet