diff --git a/src/sysinput.c b/src/sysinput.c
index 2834660..8f45b37 100644
--- a/src/sysinput.c
+++ b/src/sysinput.c
@@ -26,13 +26,19 @@ static void *input_thread(void *arg)
       for (attr = 1, mask = 1; attr <= 4; attr++, mask <<= 1)
       {
 	if (tmp & mask)
+	{
+	  Log(LDEBUG, "posting WM_HWBUTTONUP(%d)", (int)attr);
 	  MqPost1(Sys_Queue, 0, WM_HWBUTTONUP, attr);
+	}
       }
       tmp = st & ~last_bstate;
       for (attr = 1, mask = 1; attr <= 4; attr++, mask <<= 1)
       {
 	if (tmp & mask)
+	{
+	  Log(LDEBUG, "posting WM_HWBUTTONDOWN(%d)", (int)attr);
 	  MqPost1(Sys_Queue, 0, WM_HWBUTTONDOWN, attr);
+	}
       }
       last_bstate = st;
     }