diff --git a/distrho/src/DistrhoUIDSSI.cpp b/distrho/src/DistrhoUIDSSI.cpp
index 31e61428..6b96a8e9 100644
--- a/distrho/src/DistrhoUIDSSI.cpp
+++ b/distrho/src/DistrhoUIDSSI.cpp
@@ -27,7 +27,7 @@
 START_NAMESPACE_DISTRHO
 
 #if ! DISTRHO_PLUGIN_WANT_MIDI_INPUT
-static const sendNoteFunc sendNoteCallback = nullptr;
+static constexpr const sendNoteFunc sendNoteCallback = nullptr;
 #endif
 
 // -----------------------------------------------------------------------