diff --git a/src/zen/spaces/ZenSpaceManager.mjs b/src/zen/spaces/ZenSpaceManager.mjs
index e4a31b5a8..1ecb1e25a 100644
--- a/src/zen/spaces/ZenSpaceManager.mjs
+++ b/src/zen/spaces/ZenSpaceManager.mjs
@@ -649,6 +649,7 @@ class nsZenWorkspaces {
         if (Math.abs(delta) < scrollThreshold) {
           return;
         }
+        event.preventDefault();
 
         // Determine scroll direction
         let rawDirection = delta > 0 ? 1 : -1;