diff --git a/src/filesystemwatcher.h b/src/filesystemwatcher.h
index 93a57d21d..2a821d2e3 100644
--- a/src/filesystemwatcher.h
+++ b/src/filesystemwatcher.h
@@ -16,7 +16,7 @@
 #include <sys/param.h>
 #include <sys/mount.h>
 #include <string.h>
-#elif !defined Q_WS_HAIKU
+#elif !defined Q_OS_HAIKU
 #include <sys/vfs.h>
 #endif
 #endif
@@ -56,7 +56,7 @@ private:
   QHash<QString, int> m_partialTorrents;
   QPointer<QTimer> m_partialTorrentTimer;
 
-#if !defined Q_WS_WIN && !defined Q_WS_HAIKU
+#if !defined Q_OS_WIN && !defined Q_OS_HAIKU
 private:
   static bool isNetworkFileSystem(QString path) {
     QString file = path;
@@ -145,7 +145,7 @@ public:
   }
 
   void addPath(const QString & path) {
-#if !defined Q_WS_WIN && !defined Q_WS_HAIKU
+#if !defined Q_OS_WIN && !defined Q_OS_HAIKU
     QDir dir(path);
     if (!dir.exists())
       return;
@@ -167,7 +167,7 @@ public:
       qDebug("FS Watching is watching %s in normal mode", qPrintable(path));
       QFileSystemWatcher::addPath(path);
       scanLocalFolder(path);
-#if !defined Q_WS_WIN && !defined Q_WS_HAIKU
+#if !defined Q_OS_WIN && !defined Q_OS_HAIKU
     }
 #endif
   }
diff --git a/src/fs_utils.cpp b/src/fs_utils.cpp
index 449387e2e..ab58b5b82 100644
--- a/src/fs_utils.cpp
+++ b/src/fs_utils.cpp
@@ -52,7 +52,7 @@
 #if defined(Q_OS_MAC) || defined(Q_OS_FREEBSD)
 #include <sys/param.h>
 #include <sys/mount.h>
-#elif defined(Q_WS_HAIKU)
+#elif defined(Q_OS_HAIKU)
 #include <kernel/fs_info.h>
 #else
 #include <sys/vfs.h>
@@ -293,7 +293,7 @@ long long fsutils::freeDiskSpaceOnPath(QString path) {
 
 #ifndef Q_OS_WIN
   unsigned long long available;
-#ifdef Q_WS_HAIKU
+#ifdef Q_OS_HAIKU
   const QString statfs_path = dir_path.path()+"/.";
   dev_t device = dev_for_path (qPrintable(statfs_path));
   if (device >= 0) {
diff --git a/src/main.cpp b/src/main.cpp
index 405ab383d..758ab5850 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -156,7 +156,7 @@ void sigtermHandler(int) {
 void sigsegvHandler(int) {
   signal(SIGABRT, 0);
   signal(SIGSEGV, 0);
-#if !defined Q_WS_WIN && !defined Q_WS_HAIKU
+#if !defined Q_OS_WIN && !defined Q_OS_HAIKU
   std::cerr << "\n\n*************************************************************\n";
   std::cerr << "Catching SIGSEGV, please report a bug at http://bug.qbittorrent.org\nand provide the following backtrace:\n";
   std::cerr << "qBittorrent version: " << VERSION << std::endl;
@@ -173,7 +173,7 @@ void sigsegvHandler(int) {
 void sigabrtHandler(int) {
   signal(SIGABRT, 0);
   signal(SIGSEGV, 0);
-#if !defined Q_WS_WIN && !defined Q_WS_HAIKU
+#if !defined Q_OS_WIN && !defined Q_OS_HAIKU
   std::cerr << "\n\n*************************************************************\n";
   std::cerr << "Catching SIGABRT, please report a bug at http://bug.qbittorrent.org\nand provide the following backtrace:\n";
   std::cerr << "qBittorrent version: " << VERSION << std::endl;