diff --git a/qmake/library/ioutils.cpp b/qmake/library/ioutils.cpp
index 4aa3282e3b..fd84dff59d 100644
--- a/qmake/library/ioutils.cpp
+++ b/qmake/library/ioutils.cpp
@@ -258,9 +258,8 @@ bool IoUtils::touchFile(const QString &targetFileName, const QString &referenceF
 #  endif
     return true;
 }
-#endif
 
-#ifdef Q_OS_UNIX
+#if defined(QT_BUILD_QMAKE) && defined(Q_OS_UNIX)
 bool IoUtils::readLinkTarget(const QString &symlinkPath, QString *target)
 {
     const QByteArray localSymlinkPath = QFile::encodeName(symlinkPath);
@@ -295,4 +294,6 @@ bool IoUtils::readLinkTarget(const QString &symlinkPath, QString *target)
 }
 #endif
 
+#endif  // PROEVALUATOR_FULL
+
 QT_END_NAMESPACE
diff --git a/qmake/library/ioutils.h b/qmake/library/ioutils.h
index ad379404f3..32bf675f62 100644
--- a/qmake/library/ioutils.h
+++ b/qmake/library/ioutils.h
@@ -29,6 +29,8 @@
 #ifndef IOUTILS_H
 #define IOUTILS_H
 
+#include "qmake_global.h"
+
 #include <qstring.h>
 
 QT_BEGIN_NAMESPACE
@@ -39,7 +41,7 @@ namespace QMakeInternal {
   This class provides replacement functionality for QFileInfo, QFile & QDir,
   as these are abysmally slow.
 */
-class IoUtils {
+class QMAKE_EXPORT IoUtils {
 public:
     enum FileType {
         FileNotFound = 0,
@@ -64,9 +66,9 @@ public:
 #endif
 #if defined(PROEVALUATOR_FULL)
     static bool touchFile(const QString &targetFileName, const QString &referenceFileName, QString *errorString);
-#endif
-#ifdef Q_OS_UNIX
+# if defined(QT_BUILD_QMAKE) && defined(Q_OS_UNIX)
     static bool readLinkTarget(const QString &symlinkPath, QString *target);
+# endif
 #endif
 };