diff --git a/libmscore/accidental.cpp b/libmscore/accidental.cpp
index 2207cb3c70..14c5aac9ee 100644
--- a/libmscore/accidental.cpp
+++ b/libmscore/accidental.cpp
@@ -126,8 +126,8 @@ static Acc accList[] = {
       Acc(AccidentalVal::NATURAL,    0,    SymId::accidentalQuarterSharpEqualTempered),
 
       // Persian
-      Acc(AccidentalVal::NATURAL, 50,   SymId::accidentalSori),                          // SORI
-      Acc(AccidentalVal::NATURAL, -50,  SymId::accidentalKoron),                         // KORON
+      Acc(AccidentalVal::NATURAL, 33,   SymId::accidentalSori),                          // SORI
+      Acc(AccidentalVal::NATURAL, -67,  SymId::accidentalKoron),                         // KORON
       };
 
 //---------------------------------------------------------