diff --git a/libsrc/dbg/dbg.c b/libsrc/dbg/dbg.c
index 832ed0a20..dd47eae0c 100644
--- a/libsrc/dbg/dbg.c
+++ b/libsrc/dbg/dbg.c
@@ -1063,7 +1063,7 @@ static char StackHandler (void)
                 break;
 
             case 'a':
-#ifdef CH_CURS_UP:
+#ifdef CH_CURS_UP
             case CH_CURS_UP:
 #endif
                 --StackAddr;