diff --git a/Userland/Libraries/LibCore/Group.cpp b/Userland/Libraries/LibCore/Group.cpp
index 3baa651164..bc60a08caf 100644
--- a/Userland/Libraries/LibCore/Group.cpp
+++ b/Userland/Libraries/LibCore/Group.cpp
@@ -67,7 +67,7 @@ ErrorOr<void> Group::sync()
     return {};
 }
 
-#if !defined(AK_OS_BSD_GENERIC) && !defined(AK_OS_ANDROID)
+#if !defined(AK_OS_BSD_GENERIC) && !defined(AK_OS_ANDROID) && !defined(AK_OS_HAIKU)
 ErrorOr<void> Group::add_group(Group& group)
 {
     if (group.name().is_empty())
diff --git a/Userland/Libraries/LibCore/Group.h b/Userland/Libraries/LibCore/Group.h
index 1ef4e58ee2..53d3617d19 100644
--- a/Userland/Libraries/LibCore/Group.h
+++ b/Userland/Libraries/LibCore/Group.h
@@ -15,7 +15,7 @@ namespace Core {
 
 class Group {
 public:
-#if !defined(AK_OS_BSD_GENERIC) && !defined(AK_OS_ANDROID)
+#if !defined(AK_OS_BSD_GENERIC) && !defined(AK_OS_ANDROID) && !defined(AK_OS_HAIKU)
     static ErrorOr<void> add_group(Group& group);
 #endif