diff --git a/server/src/lib/score-import/import-types/ir/beatoraja/converter.ts b/server/src/lib/score-import/import-types/ir/beatoraja/converter.ts
index 2c64d72c5..1c9323cf5 100644
--- a/server/src/lib/score-import/import-types/ir/beatoraja/converter.ts
+++ b/server/src/lib/score-import/import-types/ir/beatoraja/converter.ts
@@ -97,7 +97,9 @@ export const ConverterIRBeatoraja: ConverterFunction<BeatorajaScore, BeatorajaCo
 	importType,
 	logger
 ) => {
-	if (data.lntype !== 0) {
+	// ALWAYS USE CHART.LNTYPE, NOT DATA.LNTYPE!
+	// beatoraja has a bug where IRScore LNTypes are always set to 0.
+	if (context.chart.lntype !== 0) {
 		throw new InvalidScoreFailure("CN or HCN mode is not supported by this IR.");
 	}
 
diff --git a/server/src/lib/score-import/import-types/ir/beatoraja/parser.ts b/server/src/lib/score-import/import-types/ir/beatoraja/parser.ts
index d02677d75..25577416f 100644
--- a/server/src/lib/score-import/import-types/ir/beatoraja/parser.ts
+++ b/server/src/lib/score-import/import-types/ir/beatoraja/parser.ts
@@ -53,6 +53,7 @@ const PR_BeatorajaChart = {
 	artist: "string",
 	subartist: "string",
 	total: p.isPositive,
+	lntype: p.isIn(-1, 0, 1, 2),
 
 	// currently only accepted playtypes.
 	mode: p.isIn("BEAT_7K", "BEAT_14K"),
diff --git a/server/src/lib/score-import/import-types/ir/beatoraja/types.ts b/server/src/lib/score-import/import-types/ir/beatoraja/types.ts
index 9696272b6..245c9bea6 100644
--- a/server/src/lib/score-import/import-types/ir/beatoraja/types.ts
+++ b/server/src/lib/score-import/import-types/ir/beatoraja/types.ts
@@ -21,6 +21,7 @@ export interface BeatorajaChart {
 	notes: integer;
 	hasRandom: boolean;
 	hasUndefinedLN: boolean;
+	lntype: -1 | 0 | 1 | 2;
 }
 
 export interface BeatorajaScore {