diff --git a/src/corelib/io/qfilesystemengine_unix.cpp b/src/corelib/io/qfilesystemengine_unix.cpp
index d7998c6e334..44a270d1fde 100644
--- a/src/corelib/io/qfilesystemengine_unix.cpp
+++ b/src/corelib/io/qfilesystemengine_unix.cpp
@@ -220,7 +220,7 @@ QFileSystemEntry QFileSystemEngine::canonicalName(const QFileSystemEntry &entry,
     if (entry.isEmpty() || entry.isRoot())
         return entry;
 
-#if !defined(Q_OS_MAC) && !defined(Q_OS_QNX) && !defined(Q_OS_ANDROID) && _POSIX_VERSION < 200809L
+#if !defined(Q_OS_MAC) && !defined(Q_OS_QNX) && !defined(Q_OS_ANDROID) && !defined(Q_OS_HAIKU) && _POSIX_VERSION < 200809L
     // realpath(X,0) is not supported
     Q_UNUSED(data);
     return QFileSystemEntry(slowCanonicalized(absoluteName(entry).filePath()));