diff --git a/core/math/bvh_structs.inc b/core/math/bvh_structs.inc
index b0d9ae361..7b5cc2c35 100644
--- a/core/math/bvh_structs.inc
+++ b/core/math/bvh_structs.inc
@@ -88,7 +88,11 @@ public:
 			num_items++;
 			return id;
 		}
+#ifdef DEV_ENABLED
 		return -1;
+#else
+		ERR_FAIL_V_MSG(0, "BVH request_item error.");
+#endif
 	}
 };