diff --git a/src/engine/sysDef.cpp b/src/engine/sysDef.cpp
index 7c92997fa..f676b62d2 100644
--- a/src/engine/sysDef.cpp
+++ b/src/engine/sysDef.cpp
@@ -1977,7 +1977,7 @@ void DivEngine::registerSystems() {
   );
 
   sysDefs[DIV_SYSTEM_ESFM]=new DivSysDef(
-    "ESS ES1xxx series (ESFM)", NULL, 0xd0, 0, 18, true, false, 0, false, 0,
+    "ESS ES1xxx series (ESFM)", NULL, 0xd1, 0, 18, true, false, 0, false, 0,
     "A unique FM synth featured in PC sound cards.\nBased on the OPL3 design, but with lots of its features extended.",
     {"FM 1", "FM 2", "FM 3", "FM 4", "FM 5", "FM 6", "FM 7", "FM 8", "FM 9", "FM 10", "FM 11", "FM 12", "FM 13", "FM 14", "FM 15", "FM 16", "FM 17", "FM 18"},
     {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18"},