diff --git a/mamweb/static/css/mamweb.css b/mamweb/static/css/mamweb.css
index 4e22a407..297239dc 100644
--- a/mamweb/static/css/mamweb.css
+++ b/mamweb/static/css/mamweb.css
@@ -1264,16 +1264,17 @@ label[for=id_skola] {
 
 /* Select2 používaný hlavně multiple selectem. Přidání checkboxů a změna barvy. */
 /* Podle https://stackoverflow.com/a/48290544 */
-.select2-results__option[aria-selected=true]:before {
+/* U autocomplete.ModelSelect2Multiple vyžaduje 'data-dropdown-css-class': 'select2multiple' */
+.select2multiple .select2-results__option[aria-selected=true]:before {
 	content: '☑ ';
 	padding: 0 0 0 8px;
 }
 
-.select2-results__option[aria-selected=false]:before {
+.select2multiple .select2-results__option[aria-selected=false]:before {
 	content: '◻ ';
 	padding: 0 0 0 8px;
 }
 
-.select2-results__option--highlighted {
+.select2multiple .select2-results__option--highlighted {
 	background-color: #e84e10 !important;
 }
diff --git a/odevzdavatko/forms.py b/odevzdavatko/forms.py
index 836b8eb0..7d4b6e54 100644
--- a/odevzdavatko/forms.py
+++ b/odevzdavatko/forms.py
@@ -30,6 +30,7 @@ class PosliReseniForm(forms.Form):
 				'data-placeholder--id': '-1',
 				'data-placeholder--text': '---',
 				'data-close-on-select': 'false',
+				'data-dropdown-css-class': 'select2multiple',
 				'data-allow-clear': 'true'
 				},
 			),
@@ -45,6 +46,7 @@ class PosliReseniForm(forms.Form):
 			attrs = {'data-placeholder--id': '-1',
 				'data-placeholder--text' : '---',
 				'data-close-on-select': 'false',
+				'data-dropdown-css-class': 'select2multiple',
 				'data-allow-clear': 'true'})
     		)
 
@@ -77,6 +79,7 @@ class NahrajReseniForm(forms.ModelForm):
 					attrs = {'data-placeholder--id': '-1',
 						'data-placeholder--text' : '---',
 						'data-close-on-select': 'false',
+						'data-dropdown-css-class': 'select2multiple',
 						'data-allow-clear': 'true'},
 					forward=["nadproblem_id"],
 				),
@@ -86,6 +89,7 @@ class NahrajReseniForm(forms.ModelForm):
 					attrs = {'data-placeholder--id': '-1',
 						'data-placeholder--text' : '---',
 						'data-close-on-select': 'false',
+						'data-dropdown-css-class': 'select2multiple',
 						'data-allow-clear': 'true'},
 				)
 		}