diff --git a/qmake/generators/win32/winmakefile.cpp b/qmake/generators/win32/winmakefile.cpp
index 81bc16a3c6..663665897b 100644
--- a/qmake/generators/win32/winmakefile.cpp
+++ b/qmake/generators/win32/winmakefile.cpp
@@ -537,12 +537,13 @@ void Win32MakefileGenerator::writeCleanParts(QTextStream &t)
             const QString del_statement("-$(DEL_FILE)");
             if(project->isActiveConfig("no_delete_multiple_files")) {
                 for (ProStringList::ConstIterator it = list.begin(); it != list.end(); ++it)
-                    t << "\n\t" << del_statement << " " << escapeFilePath((*it));
+                    t << "\n\t" << del_statement
+                      << ' ' << escapeFilePath(Option::fixPathToTargetOS((*it).toQString()));
             } else {
                 QString files, file;
                 const int commandlineLimit = 2047; // NT limit, expanded
                 for (ProStringList::ConstIterator it = list.begin(); it != list.end(); ++it) {
-                    file = " " + escapeFilePath((*it));
+                    file = ' ' + escapeFilePath(Option::fixPathToTargetOS((*it).toQString()));
                     if(del_statement.length() + files.length() +
                        qMax(fixEnvVariables(file).length(), file.length()) > commandlineLimit) {
                         t << "\n\t" << del_statement << files;