diff --git a/src/engine/sysDef.cpp b/src/engine/sysDef.cpp
index e4f3e6a13..790272187 100644
--- a/src/engine/sysDef.cpp
+++ b/src/engine/sysDef.cpp
@@ -1919,7 +1919,7 @@ void DivEngine::registerSystems() {
     _("Watara Supervision"), NULL, 0xe3, 0, 4, false, true, 0, false, 0, 0, 0,
     _("a handheld that was trying to compete with the Game Boy, but it never succeded."),
     {_("Pulse 1"), _("Pulse 2"), _("PCM"),  _("Noise")},
-    {"S1", "S2", "PCM", "NS"},
+    {"S1", "S2", "PCM", "NO"},
     {DIV_CH_PULSE, DIV_CH_PULSE, DIV_CH_PCM, DIV_CH_NOISE},
     {DIV_INS_SUPERVISION, DIV_INS_SUPERVISION, DIV_INS_SUPERVISION, DIV_INS_SUPERVISION},
     {DIV_INS_SUPERVISION, DIV_INS_SUPERVISION, DIV_INS_AMIGA, DIV_INS_SUPERVISION},