diff --git a/src/sfizz/Region.cpp b/src/sfizz/Region.cpp
index 23b83dcf..09f24573 100644
--- a/src/sfizz/Region.cpp
+++ b/src/sfizz/Region.cpp
@@ -209,12 +209,7 @@ bool sfz::Region::parseOpcode(const Opcode& rawOpcode, bool cleanOpcode)
         break;
     // Region logic: key mapping
     case hash("lokey"):
-        {
-            absl::optional<uint8_t> optValue = opcode.readOptional(Default::loKey);
-            triggerOnNote = optValue != absl::nullopt;
-            uint8_t value = optValue.value_or(Default::loKey);
-            keyRange.setStart(value);
-        }
+        keyRange.setStart(opcode.read(Default::loKey));
         break;
     case hash("hikey"):
         {
diff --git a/tests/RegionValuesT.cpp b/tests/RegionValuesT.cpp
index 592ecee5..b1e7032e 100644
--- a/tests/RegionValuesT.cpp
+++ b/tests/RegionValuesT.cpp
@@ -636,6 +636,7 @@ TEST_CASE("[Values] Triggers on note")
         <region> sample=kick.wav key=-1
         <region> sample=kick.wav hikey=-1 lokey=12
         <region> sample=kick.wav hikey=-1 lokey=-1
+        <region> sample=kick.wav hikey=0 lokey=12
     )");
     synth.dispatchMessage(client, 0, "/region0/trigger_on_note", "", nullptr);
     synth.dispatchMessage(client, 0, "/region1/trigger_on_note", "", nullptr);
@@ -643,12 +644,14 @@ TEST_CASE("[Values] Triggers on note")
     // TODO: Double check with Sforzando/rgc
     synth.dispatchMessage(client, 0, "/region3/trigger_on_note", "", nullptr);
     synth.dispatchMessage(client, 0, "/region4/trigger_on_note", "", nullptr);
+    synth.dispatchMessage(client, 0, "/region5/trigger_on_note", "", nullptr);
     std::vector<std::string> expected {
         "/region0/trigger_on_note,T : {  }",
         "/region1/trigger_on_note,F : {  }",
         "/region2/trigger_on_note,F : {  }",
-        "/region3/trigger_on_note,T : {  }",
+        "/region3/trigger_on_note,F : {  }",
         "/region4/trigger_on_note,F : {  }",
+        "/region5/trigger_on_note,T : {  }",
     };
     REQUIRE(messageList == expected);
 }