diff --git a/common/lib/xmodule/xmodule/css/capa/display.scss b/common/lib/xmodule/xmodule/css/capa/display.scss
index a838352b92..99ed64e4be 100644
--- a/common/lib/xmodule/xmodule/css/capa/display.scss
+++ b/common/lib/xmodule/xmodule/css/capa/display.scss
@@ -111,6 +111,7 @@ h2 {
 
 .problem-hint {
   margin-bottom: 20px;
+  width: 100%;
 }
 
 .hint-label {