diff --git a/unity/Editor/Components/MjMouseSpring.cs b/unity/Editor/Components/MjMouseSpring.cs
index c502e551..33ead857 100644
--- a/unity/Editor/Components/MjMouseSpring.cs
+++ b/unity/Editor/Components/MjMouseSpring.cs
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#if UNITY_EDITOR
 using System;
 using UnityEditor;
 using UnityEngine;
@@ -191,5 +190,4 @@ namespace Mujoco {
       }
     }
   }
-}
-#endif
+}
\ No newline at end of file