diff --git a/Tusker.xcodeproj/project.pbxproj b/Tusker.xcodeproj/project.pbxproj
index b06413e8..d55d789a 100644
--- a/Tusker.xcodeproj/project.pbxproj
+++ b/Tusker.xcodeproj/project.pbxproj
@@ -2509,6 +2509,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_OPTIMIZE_OBJECT_LIFETIME = YES;
 			};
 			name = Debug;
 		};
@@ -2565,6 +2566,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				SWIFT_OPTIMIZE_OBJECT_LIFETIME = YES;
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;