diff --git a/.travis.yml b/.travis.yml
index 791ac54eb18..40ae0c87220 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -60,7 +60,7 @@ install:
   # Build flags common to OS X and Linux.
   # Parallel builds are important for avoiding OSX build timeouts.
   # We turn off verbose output to avoid going over the 4MB output limit.
-  - export COMMON="-j4 qt5=1 test=1 mad=1 faad=1 ffmpeg=1 opus=1 modplug=1 wv=1 hss1394=0 virtualize=0 debug_assertions_fatal=1 verbose=0"
+  - export COMMON="-j4 test=1 mad=1 faad=1 ffmpeg=1 opus=1 modplug=1 wv=1 hss1394=0 virtualize=0 debug_assertions_fatal=1 verbose=0"
 
   #####
   # Ubuntu Trusty Build
diff --git a/src/controllers/controllerdebug.h b/src/controllers/controllerdebug.h
index 062240528e1..493b25c95ea 100644
--- a/src/controllers/controllerdebug.h
+++ b/src/controllers/controllerdebug.h
@@ -34,7 +34,7 @@ class ControllerDebug {
 // In order of Bug #1797746, since transition to qt5 it is needed unquote the
 // output for mixxx.log with .noquote(), because in qt5 QDebug() is quoted by default.
 
-#if QT_VERSION > 0x050399
+#if QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)
 
 #define controllerDebug(stream)       \
 {                                     \
diff --git a/src/util/logging.cpp b/src/util/logging.cpp
index 3a6d6af2d63..588a8fef642 100644
--- a/src/util/logging.cpp
+++ b/src/util/logging.cpp
@@ -14,10 +14,7 @@
 #include <QThread>
 #include <QtDebug>
 #include <QtGlobal>
-
-#if QT_VERSION >= QT_VERSION_CHECK(5, 2, 0)
 #include <QLoggingCategory>
-#endif
 
 #include "controllers/controllerdebug.h"
 #include "util/assert.h"
@@ -198,7 +195,6 @@ void Logging::initialize(const QDir& settingsDir,
     // Install the Qt message handler.
     qInstallMessageHandler(MessageHandler);
 
-#if QT_VERSION >= QT_VERSION_CHECK(5, 2, 0)
     // Ugly hack around distributions disabling debugging in Qt applications.
     // This restores the default Qt behavior. It is required for getting useful
     // logs from users and for developing controller mappings.
@@ -207,7 +203,6 @@ void Logging::initialize(const QDir& settingsDir,
     // Ubuntu: https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1731646
     QLoggingCategory::setFilterRules("*.debug=true\n"
                                      "qt.*.debug=false");
-#endif
 }
 
 // static
diff --git a/src/util/widgethider.cpp b/src/util/widgethider.cpp
index 0ecf7958c38..2ef3030e2e3 100644
--- a/src/util/widgethider.cpp
+++ b/src/util/widgethider.cpp
@@ -6,25 +6,6 @@ WidgetHider::WidgetHider(QObject* parent)
         : QObject(parent) {
 }
 
-#if QT_VERSION < QT_VERSION_CHECK(5, 2, 0)
-bool WidgetHider::eventFilter(QObject*, QEvent* ev) {
-    return ev->type() == QEvent::Paint;
-}
-
-void WidgetHider::retainSizeFor(QWidget* widget) {
-    Q_UNUSED(widget);
-}
-
-void WidgetHider::hideWidget(QWidget* w) {
-    w->installEventFilter(this);
-    w->update();
-}
-
-void WidgetHider::showWidget(QWidget* w) {
-    w->removeEventFilter(this);
-    w->update();
-}
-#else
 bool WidgetHider::eventFilter(QObject* watched, QEvent* event) {
     return QObject::eventFilter(watched,event);
 }
@@ -44,4 +25,3 @@ void WidgetHider::showWidget(QWidget* widget)
 {
     widget->setVisible(true);
 }
-#endif