diff --git a/.circleci/config.yml b/.circleci/config.yml
index fe5b1f2fd7c..408fef721a1 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -181,7 +181,7 @@ jobs:
           command: |
             # uninstall Homebrew's python 2 to prevent errors on brew install
             brew uninstall python@2 || true
-            brew update && brew install ccache fftw cmake pkg-config libogg libvorbis lame libsndfile libsamplerate jack sdl libgig libsoundio stk fluid-synth portaudio fltk qt5 carla
+            brew update && brew install ccache fftw cmake pkg-config libogg libvorbis lame libsndfile libsamplerate jack sdl libgig libsoundio lilv lv2 stk fluid-synth portaudio fltk qt5 carla
       - run:
           name: Install nodejs dependencies
           command: npm install -g appdmg
diff --git a/.travis/osx..install.sh b/.travis/osx..install.sh
index 93d478c40f4..42bf66acab4 100755
--- a/.travis/osx..install.sh
+++ b/.travis/osx..install.sh
@@ -2,7 +2,7 @@
 
 set -e
 
-PACKAGES="cmake pkg-config libogg libvorbis lame libsndfile libsamplerate jack sdl libgig libsoundio stk fluid-synth portaudio node fltk qt carla"
+PACKAGES="cmake pkg-config libogg libvorbis lame libsndfile libsamplerate lilv lv2 jack sdl libgig libsoundio stk fluid-synth portaudio node fltk qt carla"
 
 if "${TRAVIS}"; then
    PACKAGES="$PACKAGES ccache"
diff --git a/include/Lv2UridMap.h b/include/Lv2UridMap.h
index f1ddb6253b7..39cfcc44fb2 100644
--- a/include/Lv2UridMap.h
+++ b/include/Lv2UridMap.h
@@ -31,6 +31,7 @@
 
 #include <lv2/lv2plug.in/ns/ext/urid/urid.h>
 #include <mutex> // TODO: use semaphore, even though this is not realtime critical
+#include <string>
 #include <unordered_map>
 #include <vector>
 
diff --git a/plugins/Lv2Instrument/Lv2Instrument.cpp b/plugins/Lv2Instrument/Lv2Instrument.cpp
index 0f7534ac8c9..d5ba48787fb 100644
--- a/plugins/Lv2Instrument/Lv2Instrument.cpp
+++ b/plugins/Lv2Instrument/Lv2Instrument.cpp
@@ -271,13 +271,6 @@ void Lv2InsView::dropEvent(QDropEvent *_de)
 
 
 
-void Lv2InsView::toggleUI()
-{
-}
-
-
-
-
 void Lv2InsView::modelChanged()
 {
 	Lv2ViewBase::modelChanged(castModel<Lv2Instrument>());
diff --git a/plugins/Lv2Instrument/Lv2Instrument.h b/plugins/Lv2Instrument/Lv2Instrument.h
index 6451d49cdcf..4fb2e1e34c3 100644
--- a/plugins/Lv2Instrument/Lv2Instrument.h
+++ b/plugins/Lv2Instrument/Lv2Instrument.h
@@ -111,10 +111,6 @@ class Lv2InsView : public InstrumentView, public Lv2ViewBase
 	void dragEnterEvent(QDragEnterEvent *_dee) override;
 	void dropEvent(QDropEvent *_de) override;
 
-private slots:
-	void reloadPlugin();
-	void toggleUI();
-
 private:
 	void modelChanged() override;
 };
diff --git a/src/gui/Lv2ViewBase.cpp b/src/gui/Lv2ViewBase.cpp
index 9b9217e48b2..488705bcb66 100644
--- a/src/gui/Lv2ViewBase.cpp
+++ b/src/gui/Lv2ViewBase.cpp
@@ -202,6 +202,13 @@ Lv2ViewBase::~Lv2ViewBase() {
 
 
 
+void Lv2ViewBase::toggleUI()
+{
+}
+
+
+
+
 void Lv2ViewBase::toggleHelp(bool visible)
 {
 	if (m_helpWindow)