diff --git a/src/corelib/io/qfilesystemengine_symbian.cpp b/src/corelib/io/qfilesystemengine_symbian.cpp
index 18c52cbb17..c8c1dfdc84 100644
--- a/src/corelib/io/qfilesystemengine_symbian.cpp
+++ b/src/corelib/io/qfilesystemengine_symbian.cpp
@@ -114,9 +114,7 @@ QFileSystemEntry QFileSystemEngine::absoluteName(const QFileSystemEntry &entry)
 {
     QString orig = entry.filePath();
     const bool isAbsolute = entry.isAbsolute();
-    const bool isDirty = (orig.contains(QLatin1String("/../")) || orig.contains(QLatin1String("/./")) ||
-            orig.contains(QLatin1String("//")) ||
-            orig.endsWith(QLatin1String("/..")) || orig.endsWith(QLatin1String("/.")));
+    const bool isDirty = !entry.isClean();
     if (isAbsolute && !isDirty)
         return entry;
 
diff --git a/src/corelib/io/qfilesystemengine_unix.cpp b/src/corelib/io/qfilesystemengine_unix.cpp
index f1e0758bbe..966daba021 100644
--- a/src/corelib/io/qfilesystemengine_unix.cpp
+++ b/src/corelib/io/qfilesystemengine_unix.cpp
@@ -218,7 +218,7 @@ QFileSystemEntry QFileSystemEngine::canonicalName(const QFileSystemEntry &entry,
 //static
 QFileSystemEntry QFileSystemEngine::absoluteName(const QFileSystemEntry &entry)
 {
-    if (entry.isAbsolute())
+    if (entry.isAbsolute() && entry.isClean())
         return entry;
 
     QByteArray orig = entry.nativeFilePath();
diff --git a/src/corelib/io/qfilesystemengine_win.cpp b/src/corelib/io/qfilesystemengine_win.cpp
index f704fc3e90..df34184091 100644
--- a/src/corelib/io/qfilesystemengine_win.cpp
+++ b/src/corelib/io/qfilesystemengine_win.cpp
@@ -508,11 +508,7 @@ QFileSystemEntry QFileSystemEngine::absoluteName(const QFileSystemEntry &entry)
 
     if (!entry.isRelative()) {
 #if !defined(Q_OS_WINCE)
-        if (entry.isAbsolute()
-            && !entry.filePath().contains(QLatin1String("/../"))
-            && !entry.filePath().contains(QLatin1String("/./"))
-            && !entry.filePath().endsWith(QLatin1String("/.."))
-            && !entry.filePath().endsWith(QLatin1String("/."))) {
+        if (entry.isAbsolute() && entry.isClean()) {
             ret = entry.filePath();
         }  else {
             ret = QDir::fromNativeSeparators(nativeAbsoluteFilePath(entry.filePath()));
diff --git a/tests/auto/qfileinfo/tst_qfileinfo.cpp b/tests/auto/qfileinfo/tst_qfileinfo.cpp
index 92046d3e12..878493b8e3 100644
--- a/tests/auto/qfileinfo/tst_qfileinfo.cpp
+++ b/tests/auto/qfileinfo/tst_qfileinfo.cpp
@@ -481,6 +481,11 @@ void tst_QFileInfo::absolutePath_data()
     QTest::newRow("c:\\autoexec.bat") << "c:\\autoexec.bat" << "C:/"
                                       << "autoexec.bat";
 #endif
+    QTest::newRow("QTBUG-19995.1") << drivePrefix + "/System/Library/StartupItems/../Frameworks"
+                                   << drivePrefix + "/System/Library"
+                                   << "Frameworks";
+    QTest::newRow("QTBUG-19995.2") << drivePrefix + "/System/Library/StartupItems/../Frameworks/"
+                                   << drivePrefix + "/System/Library/Frameworks" << "";
 }
 
 void tst_QFileInfo::absolutePath()
@@ -502,6 +507,7 @@ void tst_QFileInfo::absFilePath_data()
 
     QTest::newRow("relativeFile") << "tmp.txt" << QDir::currentPath() + "/tmp.txt";
     QTest::newRow("relativeFileInSubDir") << "temp/tmp.txt" << QDir::currentPath() + "/" + "temp/tmp.txt";
+    QString drivePrefix;
 #if (defined(Q_OS_WIN) && !defined(Q_OS_WINCE)) || defined(Q_OS_SYMBIAN)
     QString curr = QDir::currentPath();
 
@@ -510,7 +516,7 @@ void tst_QFileInfo::absFilePath_data()
     QTest::newRow("absFilePath") << "c:\\home\\andy\\tmp.txt" << "C:/home/andy/tmp.txt";
 
     // Make sure drive-relative paths return correct absolute paths (task 255326)
-    QString drivePrefix = QDir::currentPath().left(2);
+    drivePrefix = QDir::currentPath().left(2);
     QString nonCurrentDrivePrefix =
         drivePrefix.left(1).compare("X", Qt::CaseInsensitive) == 0 ? QString("Y:") : QString("X:");
 
@@ -520,6 +526,8 @@ void tst_QFileInfo::absFilePath_data()
 #else
     QTest::newRow("absFilePath") << "/home/andy/tmp.txt" << "/home/andy/tmp.txt";
 #endif
+    QTest::newRow("QTBUG-19995") << drivePrefix + "/System/Library/StartupItems/../Frameworks"
+                                 << drivePrefix + "/System/Library/Frameworks";
 }
 
 void tst_QFileInfo::absFilePath()