diff --git a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/IrBuiltInsOverFir.kt b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/IrBuiltInsOverFir.kt
index 6791cdc0b29..edce1a1bdcd 100644
--- a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/IrBuiltInsOverFir.kt
+++ b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/IrBuiltInsOverFir.kt
@@ -228,27 +228,27 @@ class IrBuiltInsOverFir(
         return loadClass(ClassId(StandardClassIds.BASE_COLLECTIONS_PACKAGE, Name.identifier("${primitiveType.typeName}Iterator")))
     }
 
-    override val booleanIterator = primitiveIterator(PrimitiveType.BOOLEAN)
-    override val charIterator = primitiveIterator(PrimitiveType.CHAR)
-    override val byteIterator = primitiveIterator(PrimitiveType.BYTE)
-    override val shortIterator = primitiveIterator(PrimitiveType.SHORT)
-    override val intIterator = primitiveIterator(PrimitiveType.INT)
-    override val longIterator = primitiveIterator(PrimitiveType.LONG)
-    override val floatIterator = primitiveIterator(PrimitiveType.FLOAT)
-    override val doubleIterator = primitiveIterator(PrimitiveType.DOUBLE)
+    override val booleanIterator by lazy { primitiveIterator(PrimitiveType.BOOLEAN) }
+    override val charIterator by lazy { primitiveIterator(PrimitiveType.CHAR) }
+    override val byteIterator by lazy { primitiveIterator(PrimitiveType.BYTE) }
+    override val shortIterator by lazy { primitiveIterator(PrimitiveType.SHORT) }
+    override val intIterator by lazy { primitiveIterator(PrimitiveType.INT) }
+    override val longIterator by lazy { primitiveIterator(PrimitiveType.LONG) }
+    override val floatIterator by lazy { primitiveIterator(PrimitiveType.FLOAT) }
+    override val doubleIterator by lazy { primitiveIterator(PrimitiveType.DOUBLE) }
 
     private fun loadPrimitiveArray(primitiveType: PrimitiveType): IrClassSymbol {
         return loadClass(ClassId(StandardClassIds.BASE_KOTLIN_PACKAGE, Name.identifier("${primitiveType.typeName}Array")))
     }
 
-    override val booleanArray: IrClassSymbol = loadPrimitiveArray(PrimitiveType.BOOLEAN)
-    override val charArray: IrClassSymbol = loadPrimitiveArray(PrimitiveType.CHAR)
-    override val byteArray: IrClassSymbol = loadPrimitiveArray(PrimitiveType.BYTE)
-    override val shortArray: IrClassSymbol = loadPrimitiveArray(PrimitiveType.SHORT)
-    override val intArray: IrClassSymbol = loadPrimitiveArray(PrimitiveType.INT)
-    override val longArray: IrClassSymbol = loadPrimitiveArray(PrimitiveType.LONG)
-    override val floatArray: IrClassSymbol = loadPrimitiveArray(PrimitiveType.FLOAT)
-    override val doubleArray: IrClassSymbol = loadPrimitiveArray(PrimitiveType.DOUBLE)
+    override val booleanArray: IrClassSymbol by lazy { loadPrimitiveArray(PrimitiveType.BOOLEAN) }
+    override val charArray: IrClassSymbol by lazy { loadPrimitiveArray(PrimitiveType.CHAR) }
+    override val byteArray: IrClassSymbol by lazy { loadPrimitiveArray(PrimitiveType.BYTE) }
+    override val shortArray: IrClassSymbol by lazy { loadPrimitiveArray(PrimitiveType.SHORT) }
+    override val intArray: IrClassSymbol by lazy { loadPrimitiveArray(PrimitiveType.INT) }
+    override val longArray: IrClassSymbol by lazy { loadPrimitiveArray(PrimitiveType.LONG) }
+    override val floatArray: IrClassSymbol by lazy { loadPrimitiveArray(PrimitiveType.FLOAT) }
+    override val doubleArray: IrClassSymbol by lazy { loadPrimitiveArray(PrimitiveType.DOUBLE) }
 
     override val primitiveArraysToPrimitiveTypes: Map<IrClassSymbol, PrimitiveType> by lazy {
         mapOf(