diff --git a/modules/juce_audio_plugin_client/juce_audio_plugin_client_AU_2.mm b/modules/juce_audio_plugin_client/juce_audio_plugin_client_AU_2.mm
index 7252a66057..bff3992491 100644
--- a/modules/juce_audio_plugin_client/juce_audio_plugin_client_AU_2.mm
+++ b/modules/juce_audio_plugin_client/juce_audio_plugin_client_AU_2.mm
@@ -32,6 +32,7 @@ JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wparentheses",
                                      "-Wshadow-all",
                                      "-Wcast-align",
                                      "-Wswitch-enum",
+                                     "-Wimplicit-fallthrough",
                                      "-Wzero-as-null-pointer-constant",
                                      "-Wnullable-to-nonnull-conversion",
                                      "-Wignored-qualifiers",