diff --git a/dlls/msacm/msacm_main.c b/dlls/msacm/msacm_main.c
index 837418a..77c196f 100644
--- a/dlls/msacm/msacm_main.c
+++ b/dlls/msacm/msacm_main.c
@@ -9,6 +9,8 @@
 #include "msacm.h"
 #include "debug.h"
 
+DEFAULT_DEBUG_CHANNEL(msacm)
+
 /***********************************************************************
  *           ACMGETVERSION (MSACM.7)
  */