diff --git a/include/wups/button_combo/defines.h b/include/wups/button_combo/defines.h
index 7348008..0396f0f 100644
--- a/include/wups/button_combo/defines.h
+++ b/include/wups/button_combo/defines.h
@@ -114,7 +114,7 @@ typedef struct WUPSButtonCombo_ComboHandle {
 #endif
 } WUPSButtonCombo_ComboHandle;
 
-typedef void (*WUPSButtonCombo_ComboCallback)(WUPSButtonCombo_ComboHandle handle, void *context);
+typedef void (*WUPSButtonCombo_ComboCallback)(WUPSButtonCombo_ControllerTypes triggeredBy, WUPSButtonCombo_ComboHandle handle, void *context);
 
 typedef struct WUPSButtonCombo_MetaOptions {
     const char *label;