diff --git a/machines/johno-macbookpro/configuration.nix b/machines/johno-macbookpro/configuration.nix
index a1c7c95..be7d1e4 100644
--- a/machines/johno-macbookpro/configuration.nix
+++ b/machines/johno-macbookpro/configuration.nix
@@ -12,6 +12,13 @@
     dock.autohide = true;
     finder.AppleShowAllExtensions = true;
     NSGlobalDomain.AppleShowAllExtensions = true;
+
+    # Configure spaces to span displays (required for aerospace multi-monitor support)
+    CustomUserPreferences = {
+      "com.apple.spaces" = {
+        spans-displays = true;
+      };
+    };
   };
 
   # TODO: Find a way to not duplicate this