diff --git a/AKLocationManagerDemo.xcodeproj/project.xcworkspace/xcshareddata/AKLocationManagerDemo.xccheckout b/AKLocationManagerDemo.xcodeproj/project.xcworkspace/xcshareddata/AKLocationManagerDemo.xccheckout
deleted file mode 100644
index 1fc243a..0000000
--- a/AKLocationManagerDemo.xcodeproj/project.xcworkspace/xcshareddata/AKLocationManagerDemo.xccheckout
+++ /dev/null
@@ -1,41 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>IDESourceControlProjectFavoriteDictionaryKey</key>
-	<false/>
-	<key>IDESourceControlProjectIdentifier</key>
-	<string>0264C95B-73A9-4FC5-A90D-C03B58C0EEC4</string>
-	<key>IDESourceControlProjectName</key>
-	<string>AKLocationManagerDemo</string>
-	<key>IDESourceControlProjectOriginsDictionary</key>
-	<dict>
-		<key>F6DBEDC9-2701-425B-A235-474F5BAE0DD8</key>
-		<string>ssh://github.com/appkraft/AKLocationManager.git</string>
-	</dict>
-	<key>IDESourceControlProjectPath</key>
-	<string>AKLocationManagerDemo.xcodeproj/project.xcworkspace</string>
-	<key>IDESourceControlProjectRelativeInstallPathDictionary</key>
-	<dict>
-		<key>F6DBEDC9-2701-425B-A235-474F5BAE0DD8</key>
-		<string>../..</string>
-	</dict>
-	<key>IDESourceControlProjectURL</key>
-	<string>ssh://github.com/appkraft/AKLocationManager.git</string>
-	<key>IDESourceControlProjectVersion</key>
-	<integer>110</integer>
-	<key>IDESourceControlProjectWCCIdentifier</key>
-	<string>F6DBEDC9-2701-425B-A235-474F5BAE0DD8</string>
-	<key>IDESourceControlProjectWCConfigurations</key>
-	<array>
-		<dict>
-			<key>IDESourceControlRepositoryExtensionIdentifierKey</key>
-			<string>public.vcs.git</string>
-			<key>IDESourceControlWCCIdentifierKey</key>
-			<string>F6DBEDC9-2701-425B-A235-474F5BAE0DD8</string>
-			<key>IDESourceControlWCCName</key>
-			<string>AKLocationManager</string>
-		</dict>
-	</array>
-</dict>
-</plist>
diff --git a/Classes/AKLocationManager.m b/Classes/AKLocationManager.m
index feca44a..513c313 100644
--- a/Classes/AKLocationManager.m
+++ b/Classes/AKLocationManager.m
@@ -78,7 +78,9 @@ + (void)startLocatingWithUpdateBlock:(LocationUpdateBlock)didUpdate
             NSError *e = [NSError errorWithDomain:kAKLocationManagerErrorDomain
                                              code:AKLocationManagerErrorCannotLocate
                                          userInfo:nil];
-            didFail(e);
+            if (didFail) {
+                didFail(e);
+            }
             return;
         }