diff --git a/distrho/DistrhoUI.hpp b/distrho/DistrhoUI.hpp
index e802f663..df042753 100644
--- a/distrho/DistrhoUI.hpp
+++ b/distrho/DistrhoUI.hpp
@@ -20,6 +20,16 @@
 #include "extra/LeakDetector.hpp"
 #include "src/DistrhoPluginChecks.h"
 
+#ifdef DGL_CAIRO
+# include "Cairo.hpp"
+#endif
+#ifdef DGL_OPENGL
+# include "OpenGL.hpp"
+#endif
+#ifdef DGL_VULKAN
+# include "Vulkan.hpp"
+#endif
+
 #if DISTRHO_PLUGIN_HAS_EXTERNAL_UI
 # include "../dgl/Base.hpp"
 # include "extra/ExternalWindow.hpp"
@@ -38,13 +48,6 @@ typedef DGL_NAMESPACE::NanoTopLevelWidget UIWidget;
 typedef DGL_NAMESPACE::TopLevelWidget UIWidget;
 #endif
 
-#ifdef DGL_CAIRO
-# include "Cairo.hpp"
-#endif
-#ifdef DGL_OPENGL
-# include "OpenGL.hpp"
-#endif
-
 START_NAMESPACE_DISTRHO
 
 /* ------------------------------------------------------------------------------------------------------------
diff --git a/examples/CairoUI/CairoExamplePlugin.cpp b/examples/CairoUI/CairoExamplePlugin.cpp
index b6df8799..161399e5 100644
--- a/examples/CairoUI/CairoExamplePlugin.cpp
+++ b/examples/CairoUI/CairoExamplePlugin.cpp
@@ -77,7 +77,13 @@ public:
 
     void run(const float** inputs, float** outputs, uint32_t frames)
     {
-        memcpy(outputs[0], inputs[0], frames * sizeof(float));
+       /**
+          This plugin does nothing, it just demonstrates cairo UI usage.
+          So here we directly copy inputs over outputs, leaving the audio untouched.
+          We need to be careful in case the host re-uses the same buffer for both inputs and outputs.
+        */
+        if (outputs[0] != inputs[0])
+            std::memcpy(outputs[0], inputs[0], sizeof(float)*frames);
     }
 };
 
diff --git a/examples/ExternalUI/ExternalExamplePlugin.cpp b/examples/ExternalUI/ExternalExamplePlugin.cpp
index dbecdcc6..92b1b12e 100644
--- a/examples/ExternalUI/ExternalExamplePlugin.cpp
+++ b/examples/ExternalUI/ExternalExamplePlugin.cpp
@@ -157,7 +157,7 @@ protected:
        /**
           This plugin does nothing, it just demonstrates information usage.
           So here we directly copy inputs over outputs, leaving the audio untouched.
-          We need to be careful in case the host re-uses the same buffer for both ins and outs.
+          We need to be careful in case the host re-uses the same buffer for both inputs and outputs.
         */
         if (outputs[0] != inputs[0])
             std::memcpy(outputs[0], inputs[0], sizeof(float)*frames);
diff --git a/examples/FileHandling/FileHandlingPlugin.cpp b/examples/FileHandling/FileHandlingPlugin.cpp
index 074e5ec4..db134ce3 100644
--- a/examples/FileHandling/FileHandlingPlugin.cpp
+++ b/examples/FileHandling/FileHandlingPlugin.cpp
@@ -227,7 +227,7 @@ protected:
        /**
           This plugin doesn't do audio, it just demonstrates file handling usage.
           So here we directly copy inputs over outputs, leaving the audio untouched.
-          We need to be careful in case the host re-uses the same buffer for both ins and outs.
+          We need to be careful in case the host re-uses the same buffer for both inputs and outputs.
         */
         if (outputs[0] != inputs[0])
             std::memcpy(outputs[0], inputs[0], sizeof(float)*frames);
diff --git a/examples/Info/InfoExamplePlugin.cpp b/examples/Info/InfoExamplePlugin.cpp
index bd4829ea..15c4f41e 100644
--- a/examples/Info/InfoExamplePlugin.cpp
+++ b/examples/Info/InfoExamplePlugin.cpp
@@ -208,7 +208,7 @@ protected:
        /**
           This plugin does nothing, it just demonstrates information usage.
           So here we directly copy inputs over outputs, leaving the audio untouched.
-          We need to be careful in case the host re-uses the same buffer for both ins and outs.
+          We need to be careful in case the host re-uses the same buffer for both inputs and outputs.
         */
         if (outputs[0] != inputs[0])
             std::memcpy(outputs[0], inputs[0], sizeof(float)*frames);
diff --git a/examples/Parameters/ExamplePluginParameters.cpp b/examples/Parameters/ExamplePluginParameters.cpp
index ea6ec6d1..3d995ed8 100644
--- a/examples/Parameters/ExamplePluginParameters.cpp
+++ b/examples/Parameters/ExamplePluginParameters.cpp
@@ -251,7 +251,7 @@ The plugin will be treated as an effect, but it will not change the host audio."
        /**
           This plugin does nothing, it just demonstrates parameter usage.
           So here we directly copy inputs over outputs, leaving the audio untouched.
-          We need to be careful in case the host re-uses the same buffer for both ins and outs.
+          We need to be careful in case the host re-uses the same buffer for both inputs and outputs.
         */
         if (outputs[0] != inputs[0])
             std::memcpy(outputs[0], inputs[0], sizeof(float)*frames);
diff --git a/examples/States/ExamplePluginStates.cpp b/examples/States/ExamplePluginStates.cpp
index b9f9ee57..66cba49d 100644
--- a/examples/States/ExamplePluginStates.cpp
+++ b/examples/States/ExamplePluginStates.cpp
@@ -279,7 +279,7 @@ The plugin will be treated as an effect, but it will not change the host audio."
        /**
           This plugin does nothing, it just demonstrates state usage.
           So here we directly copy inputs over outputs, leaving the audio untouched.
-          We need to be careful in case the host re-uses the same buffer for both ins and outs.
+          We need to be careful in case the host re-uses the same buffer for both inputs and outputs.
         */
         if (outputs[0] != inputs[0])
             std::memcpy(outputs[0], inputs[0], sizeof(float)*frames);