diff --git a/iso/iso.cpp b/iso/iso.cpp
--- a/iso/iso.cpp
+++ b/iso/iso.cpp
@@ -512,7 +512,7 @@
     QString path = url.path();
     REPLACE_DIR_SEP2(path);
 
-#ifdef Q_WS_WIN
+#ifdef Q_OS_WIN
     if (path.startsWith(DIR_SEPARATOR)) {
         int p = 1;
         while (p < path.length() && path[ p ] == DIR_SEPARATOR_CHAR)
diff --git a/iso/libisofs/iso_fs.h b/iso/libisofs/iso_fs.h
--- a/iso/libisofs/iso_fs.h
+++ b/iso/libisofs/iso_fs.h
@@ -26,7 +26,7 @@
 
 #include "bswap.h"
 
-#ifdef Q_WS_WIN
+#ifdef Q_OS_WIN
 #define DIR_SEPARATOR       "/"
 #define DIR_SEPARATOR2      "\\"
 #define DIR_SEPARATOR_CHAR  '/'
diff --git a/krArc/krarc.h b/krArc/krarc.h
--- a/krArc/krarc.h
+++ b/krArc/krarc.h
@@ -124,7 +124,7 @@
     QTextCodec * codec;
 };
 
-#ifdef Q_WS_WIN
+#ifdef Q_OS_WIN
 #define DIR_SEPARATOR       "/"
 #define DIR_SEPARATOR2      "\\"
 #define DIR_SEPARATOR_CHAR  '/'
diff --git a/krArc/krarc.cpp b/krArc/krarc.cpp
--- a/krArc/krarc.cpp
+++ b/krArc/krarc.cpp
@@ -1162,15 +1162,15 @@
     mode_t mode = 0;
     // file type
     if (perm[0] == 'd') mode |= S_IFDIR;
-#ifndef Q_WS_WIN
+#ifndef Q_OS_WIN
     if (perm[0] == 'l') mode |= S_IFLNK;
 #endif
     if (perm[0] == '-') mode |= S_IFREG;
     // owner permissions
     if (perm[1] != '-') mode |= S_IRUSR;
     if (perm[2] != '-') mode |= S_IWUSR;
     if (perm[3] != '-') mode |= S_IXUSR;
-#ifndef Q_WS_WIN
+#ifndef Q_OS_WIN
     // group permissions
     if (perm[4] != '-') mode |= S_IRGRP;
     if (perm[5] != '-') mode |= S_IWGRP;
@@ -1333,7 +1333,7 @@
         owner = nextWord(line);
         group = nextWord(line);
         // symlink destination
-#ifndef Q_WS_WIN
+#ifndef Q_OS_WIN
         if (S_ISLNK(mode)) {
             // ignore the next 3 fields
             nextWord(line); nextWord(line); nextWord(line);
@@ -1695,7 +1695,7 @@
         }
     }
     // checking if it's an absolute path
-#ifdef Q_WS_WIN
+#ifdef Q_OS_WIN
     if (cmd.length() > 2 && cmd[ 0 ].isLetter() && cmd[ 1 ] == ':')
         return true;
 #else
@@ -1921,7 +1921,7 @@
     QString path = url.adjusted(options).path();
     REPLACE_DIR_SEP2(path);
 
-#ifdef Q_WS_WIN
+#ifdef Q_OS_WIN
     if (path.startsWith(DIR_SEPARATOR)) {
         int p = 1;
         while (p < path.length() && path[ p ] == DIR_SEPARATOR_CHAR)
diff --git a/krusader/FileSystem/defaultfilesystem.cpp b/krusader/FileSystem/defaultfilesystem.cpp
--- a/krusader/FileSystem/defaultfilesystem.cpp
+++ b/krusader/FileSystem/defaultfilesystem.cpp
@@ -323,7 +323,7 @@
 bool DefaultFileSystem::refreshLocal(const QUrl &directory, bool onlyScan) {
     const QString path = KrServices::urlToLocalPath(directory);
 
-#ifdef Q_WS_WIN
+#ifdef Q_OS_WIN
     if (!path.contains("/")) { // change C: to C:/
         path = path + QString("/");
     }
diff --git a/krusader/FileSystem/krpermhandler.cpp b/krusader/FileSystem/krpermhandler.cpp
--- a/krusader/FileSystem/krpermhandler.cpp
+++ b/krusader/FileSystem/krpermhandler.cpp
@@ -71,7 +71,7 @@
     int groupNo = getgroups(200, groupList);
 
 // In kdewin32 implementation as of 4.1.2, getpwent always returns the same struct
-#ifndef Q_WS_WIN
+#ifndef Q_OS_WIN
     // fill the UID cache
     struct passwd *pass;
     while ((pass = getpwent()) != nullptr) {
diff --git a/krusader/defaults.h b/krusader/defaults.h
--- a/krusader/defaults.h
+++ b/krusader/defaults.h
@@ -315,7 +315,7 @@
 #define _ImmediateContextMenu true
 
 // Root directory
-#ifdef Q_WS_WIN
+#ifdef Q_OS_WIN
 #define DIR_SEPARATOR       "/"
 #define DIR_SEPARATOR2      "\\"
 #define DIR_SEPARATOR_CHAR  '/'
diff --git a/krusader/krservices.cpp b/krusader/krservices.cpp
--- a/krusader/krservices.cpp
+++ b/krusader/krservices.cpp
@@ -294,7 +294,7 @@
     QString path = fileUrl.toLocalFile();
     REPLACE_DIR_SEP2(path);
 
-#ifdef Q_WS_WIN
+#ifdef Q_OS_WIN
     if (path.startsWith(DIR_SEPARATOR)) {
         int p = 1;
         while (p < path.length() && path[ p ] == DIR_SEPARATOR_CHAR)