diff --git a/res/css/structures/_ViewSource.pcss b/res/css/structures/_ViewSource.pcss
index c063eeb49cd..52d3afecc4f 100644
--- a/res/css/structures/_ViewSource.pcss
+++ b/res/css/structures/_ViewSource.pcss
@@ -27,6 +27,7 @@ limitations under the License.
         border-bottom: 1px solid $quinary-content;
         padding-bottom: $spacing-12;
         margin-bottom: $spacing-12;
+        font-family: monospace;
 
         .mx_CopyableText {
             word-break: break-all;