diff --git a/armsrc/mifaresim.c b/armsrc/mifaresim.c
index a4e743406..37836f1ad 100644
--- a/armsrc/mifaresim.c
+++ b/armsrc/mifaresim.c
@@ -15,6 +15,10 @@
 // MF_DBG_ERROR         1
 // MF_DBG_ALL           2
 // MF_DBG_EXTENDED      4
+//
+//  /!\ Printing Debug message is disrupting emulation, 
+//  Only use with caution during debugging 
+
 
 #include "iso14443a.h"
 #include "mifaresim.h"