diff --git a/src/corelib/io/qprocess.cpp b/src/corelib/io/qprocess.cpp
index a45225f3f7..d18571ca6c 100644
--- a/src/corelib/io/qprocess.cpp
+++ b/src/corelib/io/qprocess.cpp
@@ -190,8 +190,8 @@ template<> void QSharedDataPointer<QProcessEnvironmentPrivate>::detach()
 QStringList QProcessEnvironmentPrivate::toList() const
 {
     QStringList result;
-    QHash<Unit, Unit>::ConstIterator it = hash.constBegin(),
-                                    end = hash.constEnd();
+    Hash::ConstIterator it = hash.constBegin(),
+                       end = hash.constEnd();
     for ( ; it != end; ++it) {
         QString data = nameToString(it.key());
         QString value = valueToString(it.value());
@@ -224,8 +224,8 @@ QProcessEnvironment QProcessEnvironmentPrivate::fromList(const QStringList &list
 QStringList QProcessEnvironmentPrivate::keys() const
 {
     QStringList result;
-    QHash<Unit, Unit>::ConstIterator it = hash.constBegin(),
-                                    end = hash.constEnd();
+    Hash::ConstIterator it = hash.constBegin(),
+                       end = hash.constEnd();
     for ( ; it != end; ++it)
         result << nameToString(it.key());
     return result;
@@ -233,8 +233,8 @@ QStringList QProcessEnvironmentPrivate::keys() const
 
 void QProcessEnvironmentPrivate::insert(const Hash &h)
 {
-    QHash<Unit, Unit>::ConstIterator it = h.constBegin(),
-                                    end = h.constEnd();
+    Hash::ConstIterator it = h.constBegin(),
+                       end = h.constEnd();
     for ( ; it != end; ++it)
         hash.insert(it.key(), it.value());
 }
diff --git a/src/corelib/io/qprocess_unix.cpp b/src/corelib/io/qprocess_unix.cpp
index f53742b815..7ee66ec955 100644
--- a/src/corelib/io/qprocess_unix.cpp
+++ b/src/corelib/io/qprocess_unix.cpp
@@ -467,7 +467,7 @@ bool QProcessPrivate::createChannel(Channel &channel)
     }
 }
 
-static char **_q_dupEnvironment(const QHash<QByteArray, QByteArray> &environment, int *envc)
+static char **_q_dupEnvironment(const QProcessEnvironmentPrivate::Hash &environment, int *envc)
 {
     *envc = 0;
     if (environment.isEmpty())
@@ -489,8 +489,8 @@ static char **_q_dupEnvironment(const QHash<QByteArray, QByteArray> &environment
     envp[environment.count()] = 0;
     envp[environment.count() + 1] = 0;
 
-    QHash<QByteArray, QByteArray>::ConstIterator it = environment.constBegin();
-    const QHash<QByteArray, QByteArray>::ConstIterator end = environment.constEnd();
+    QProcessEnvironmentPrivate::Hash::ConstIterator it = environment.constBegin();
+    const QProcessEnvironmentPrivate::Hash::ConstIterator end = environment.constEnd();
     for ( ; it != end; ++it) {
         QByteArray key = it.key();
         QByteArray value = it.value();
diff --git a/src/corelib/io/qprocess_win.cpp b/src/corelib/io/qprocess_win.cpp
index 625ed9853f..74d8926546 100644
--- a/src/corelib/io/qprocess_win.cpp
+++ b/src/corelib/io/qprocess_win.cpp
@@ -278,11 +278,11 @@ static QString qt_create_commandline(const QString &program, const QStringList &
     return args;
 }
 
-static QByteArray qt_create_environment(const QHash<QString, QString> &environment)
+static QByteArray qt_create_environment(const QProcessEnvironmentPrivate::Hash &environment)
 {
     QByteArray envlist;
     if (!environment.isEmpty()) {
-        QHash<QString, QString> copy = environment;
+        QProcessEnvironmentPrivate::Hash copy = environment;
 
         // add PATH if necessary (for DLL loading)
         if (!copy.contains(QLatin1String("PATH"))) {
@@ -299,8 +299,8 @@ static QByteArray qt_create_environment(const QHash<QString, QString> &environme
         }
 
         int pos = 0;
-        QHash<QString, QString>::ConstIterator it = copy.constBegin(),
-                                              end = copy.constEnd();
+        QProcessEnvironmentPrivate::Hash::ConstIterator it = copy.constBegin(),
+                                                       end = copy.constEnd();
 
         static const wchar_t equal = L'=';
         static const wchar_t nul = L'\0';