diff --git a/.travis.yml b/.travis.yml
index 8302af5..cc2ab93 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,5 +3,5 @@ osx_image: xcode8.3
 podfile: ObjectiveCExample/Podfile
 xcode_workspace: ObjectiveCExample/ObjectiveCExample.xcworkspace
 xcode_scheme: ObjectiveCExample
-script: xcodebuild -workspace ObjectiveCExample/ObjectiveCExample.xcworkspace -scheme ObjectiveCExample -sdk iphonesimulator -destination "id=99F4F45C-3B72-4473-A6C5-3FD81EF3C25D" -configuration Debug ONLY_ACTIVE_ARCH=NO ENABLE_TESTABILITY=YES test
+script: xcodebuild -workspace ObjectiveCExample/ObjectiveCExample.xcworkspace -scheme ObjectiveCExample -sdk iphonesimulator -destination "id=F60B87EC-8969-41A7-90ED-D0826ECC32DB" -configuration Debug ONLY_ACTIVE_ARCH=NO ENABLE_TESTABILITY=YES test
 
diff --git a/SSZipArchive/SSZipArchive.h b/SSZipArchive/SSZipArchive.h
index 4aa2dba..4afb9c5 100755
--- a/SSZipArchive/SSZipArchive.h
+++ b/SSZipArchive/SSZipArchive.h
@@ -17,7 +17,7 @@ NS_ASSUME_NONNULL_BEGIN
 extern NSString *const SSZipArchiveErrorDomain;
 typedef NS_ENUM(NSInteger, SSZipArchiveErrorCode) {
     SSZipArchiveErrorCodeFailedOpenZipFile      = -1,
-    SSZipArchiveErrorCodeFailedOpenFirstFile    = -2,
+    SSZipArchiveErrorCodeFailedOpenFileInZip    = -2,
     SSZipArchiveErrorCodeFileInfoNotLoadable    = -3,
     SSZipArchiveErrorCodeFileContentNotReadable = -4,
 };
diff --git a/SSZipArchive/SSZipArchive.m b/SSZipArchive/SSZipArchive.m
index cd87b50..8554daf 100755
--- a/SSZipArchive/SSZipArchive.m
+++ b/SSZipArchive/SSZipArchive.m
@@ -88,7 +88,7 @@ NSString *const SSZipArchiveErrorDomain = @"SSZipArchiveErrorDomain";
                 if (ret != UNZ_BADPASSWORD) {
                     if (error) {
                         *error = [NSError errorWithDomain:SSZipArchiveErrorDomain
-                                                     code:SSZipArchiveErrorCodeFailedOpenFirstFile
+                                                     code:SSZipArchiveErrorCodeFailedOpenFileInZip
                                                  userInfo:@{NSLocalizedDescriptionKey: @"failed to open first file in zip file"}];
                     }
                 }
@@ -218,7 +218,7 @@ NSString *const SSZipArchiveErrorDomain = @"SSZipArchiveErrorDomain";
     if (unzGoToFirstFile(zip) != UNZ_OK)
     {
         NSDictionary *userInfo = @{NSLocalizedDescriptionKey: @"failed to open first file in zip file"};
-        NSError *err = [NSError errorWithDomain:SSZipArchiveErrorDomain code:SSZipArchiveErrorCodeFailedOpenFirstFile userInfo:userInfo];
+        NSError *err = [NSError errorWithDomain:SSZipArchiveErrorDomain code:SSZipArchiveErrorCodeFailedOpenFileInZip userInfo:userInfo];
         if (error)
         {
             *error = err;
@@ -257,7 +257,7 @@ NSString *const SSZipArchiveErrorDomain = @"SSZipArchiveErrorDomain";
             }
             
             if (ret != UNZ_OK) {
-                unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:-2 userInfo:@{NSLocalizedDescriptionKey: @"failed to open file in zip file"}];
+                unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:SSZipArchiveErrorCodeFailedOpenFileInZip userInfo:@{NSLocalizedDescriptionKey: @"failed to open file in zip file"}];
                 success = NO;
                 break;
             }
@@ -268,7 +268,7 @@ NSString *const SSZipArchiveErrorDomain = @"SSZipArchiveErrorDomain";
             
             ret = unzGetCurrentFileInfo(zip, &fileInfo, NULL, 0, NULL, 0, NULL, 0);
             if (ret != UNZ_OK) {
-                unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:-3 userInfo:@{NSLocalizedDescriptionKey: @"failed to retrieve info for file"}];
+                unzippingError = [NSError errorWithDomain:@"SSZipArchiveErrorDomain" code:SSZipArchiveErrorCodeFileInfoNotLoadable userInfo:@{NSLocalizedDescriptionKey: @"failed to retrieve info for file"}];
                 success = NO;
                 unzCloseCurrentFile(zip);
                 break;