diff --git a/distrho/src/DistrhoPluginVST.cpp b/distrho/src/DistrhoPluginVST.cpp
index 2d05b782..04074ce7 100644
--- a/distrho/src/DistrhoPluginVST.cpp
+++ b/distrho/src/DistrhoPluginVST.cpp
@@ -182,6 +182,11 @@ public:
 //#endif
     }
 
+    ~UIVst()
+    {
+        fUI.quit();
+    }
+
     // -------------------------------------------------------------------
 
     void idle()
diff --git a/distrho/src/DistrhoUILV2.cpp b/distrho/src/DistrhoUILV2.cpp
index 79c7e212..a5ecdd37 100644
--- a/distrho/src/DistrhoUILV2.cpp
+++ b/distrho/src/DistrhoUILV2.cpp
@@ -118,6 +118,11 @@ public:
             fUI.setWindowTitle(DISTRHO_PLUGIN_NAME);
     }
 
+    ~UiLv2()
+    {
+        fUI.quit();
+    }
+
     // -------------------------------------------------------------------
 
     void lv2ui_port_event(const uint32_t rindex, const uint32_t bufferSize, const uint32_t format, const void* const buffer)