diff --git a/addons/web/static/src/scss/modal.scss b/addons/web/static/src/scss/modal.scss
index 54bbbc2a696..29ce3f16578 100644
--- a/addons/web/static/src/scss/modal.scss
+++ b/addons/web/static/src/scss/modal.scss
@@ -7,6 +7,10 @@
             margin-left: 10px;
         }
 
+        .modal-header .modal-title {
+            word-break: break-word;
+        }
+
         .modal-body {
             &.o_act_window {
                 padding: 0;