diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index e5c0050d6..81e4c3ae0 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -311,7 +311,7 @@ const char* cmdName[]={
 
   "WS_GLOBAL_SPEAKER_VOLUME",
 
-  "FM_ALGORITHM"
+  "FM_ALG"
 };
 
 static_assert((sizeof(cmdName)/sizeof(void*))==DIV_CMD_MAX,"update cmdName!");
diff --git a/src/engine/sysDef.cpp b/src/engine/sysDef.cpp
index c235ac443..10d2ec502 100644
--- a/src/engine/sysDef.cpp
+++ b/src/engine/sysDef.cpp
@@ -502,7 +502,7 @@ void DivEngine::registerSystems() {
     {0x5e, {DIV_CMD_FM_D2R, _("5Exx: Set decay 2 of operator 3 (0 to 1F)"), constVal<2>, effectValAnd<31>}},
     {0x5f, {DIV_CMD_FM_D2R, _("5Fxx: Set decay 2 of operator 4 (0 to 1F)"), constVal<3>, effectValAnd<31>}},
     {0x60, {DIV_CMD_FM_OPMASK, _("60xx: Set operator mask (bits 0-3)")}},
-    {0xb3, {DIV_CMD_FM_ALG, _("B3xx: Set algorithm (0 to 7)")}},
+    {0x61, {DIV_CMD_FM_ALG, _("61xx: Set algorithm (0 to 7)")}},
   };
 
   EffectHandlerMap fmOPMPostEffectHandlerMap(fmOPNPostEffectHandlerMap);