diff --git a/Sources/XcodeGenKit/SourceGenerator.swift b/Sources/XcodeGenKit/SourceGenerator.swift
index 6692be88..55939c73 100644
--- a/Sources/XcodeGenKit/SourceGenerator.swift
+++ b/Sources/XcodeGenKit/SourceGenerator.swift
@@ -62,7 +62,7 @@ class SourceGenerator {
         }
 
         if chosenBuildPhase == .headers {
-            let headerVisibility = targetSource.headerVisibility ?? .project
+            let headerVisibility = targetSource.headerVisibility ?? .public
             if headerVisibility != .project {
                 // Xcode doesn't write the default of project
                 settings["ATTRIBUTES"] = [headerVisibility.settingName]
diff --git a/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj b/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
index 1e212d0d..d3eeabdc 100644
--- a/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
+++ b/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
@@ -30,12 +30,12 @@
 		BF_331192862207 /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = FR_481575785861 /* ViewController.swift */; settings = {COMPILER_FLAGS = "-Werror"; }; };
 		BF_334778067417 = {isa = PBXBuildFile; fileRef = FR_783122899910 /* App_iOS_Tests.xctest */; };
 		BF_360196406184 /* TestProjectTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = FR_722239415598 /* TestProjectTests.swift */; };
-		BF_425679397292 /* MyFramework.h in Headers */ = {isa = PBXBuildFile; fileRef = FR_183521624014 /* MyFramework.h */; };
+		BF_425679397292 /* MyFramework.h in Headers */ = {isa = PBXBuildFile; fileRef = FR_183521624014 /* MyFramework.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		BF_441538117869 /* App_watchOS Extension.appex in CopyFiles */ = {isa = PBXBuildFile; fileRef = FR_507023492251 /* App_watchOS Extension.appex */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		BF_447782698339 /* Alamofire.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FR_752394658615 /* Alamofire.framework */; };
 		BF_456457948943 /* FrameworkFile.swift in Sources */ = {isa = PBXBuildFile; fileRef = FR_172952167809 /* FrameworkFile.swift */; };
 		BF_470396236719 /* Alamofire.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FR_410645050443 /* Alamofire.framework */; };
-		BF_496472559782 /* MyFramework.h in Headers */ = {isa = PBXBuildFile; fileRef = FR_183521624014 /* MyFramework.h */; };
+		BF_496472559782 /* MyFramework.h in Headers */ = {isa = PBXBuildFile; fileRef = FR_183521624014 /* MyFramework.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		BF_503484983186 /* MoreUnder.swift in Sources */ = {isa = PBXBuildFile; fileRef = FR_196911129660 /* MoreUnder.swift */; };
 		BF_510053944904 /* Headers in Headers */ = {isa = PBXBuildFile; fileRef = FR_815403394914 /* Headers */; settings = {ATTRIBUTES = (Public, ); }; };
 		BF_511197657446 /* Alamofire.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FR_452853029807 /* Alamofire.framework */; };
@@ -49,10 +49,10 @@
 		BF_721498080533 /* ResourceFolder in Resources */ = {isa = PBXBuildFile; fileRef = FR_257073931060 /* ResourceFolder */; };
 		BF_729846993631 /* Alamofire.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FR_410645050443 /* Alamofire.framework */; };
 		BF_732745079658 = {isa = PBXBuildFile; fileRef = FR_324671077936 /* App_watchOS.app */; };
-		BF_734036107922 /* MyFramework.h in Headers */ = {isa = PBXBuildFile; fileRef = FR_183521624014 /* MyFramework.h */; };
+		BF_734036107922 /* MyFramework.h in Headers */ = {isa = PBXBuildFile; fileRef = FR_183521624014 /* MyFramework.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		BF_747443236192 /* App_watchOS.app in CopyFiles */ = {isa = PBXBuildFile; fileRef = FR_324671077936 /* App_watchOS.app */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		BF_757906110813 = {isa = PBXBuildFile; fileRef = FR_662315837182 /* Framework.framework */; };
-		BF_813358525536 /* MyFramework.h in Headers */ = {isa = PBXBuildFile; fileRef = FR_183521624014 /* MyFramework.h */; };
+		BF_813358525536 /* MyFramework.h in Headers */ = {isa = PBXBuildFile; fileRef = FR_183521624014 /* MyFramework.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		BF_830383951771 /* NotificationController.swift in Sources */ = {isa = PBXBuildFile; fileRef = FR_304712043717 /* NotificationController.swift */; };
 		BF_854463933379 = {isa = PBXBuildFile; fileRef = FR_438704538506 /* Framework.framework */; };
 		BF_860391087135 /* StandaloneAssets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = FR_408537768279 /* StandaloneAssets.xcassets */; };