diff --git a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrClassifierStorage.kt b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrClassifierStorage.kt
index 1c13f8f0fef..b1890aa3d32 100644
--- a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrClassifierStorage.kt
+++ b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrClassifierStorage.kt
@@ -562,7 +562,6 @@ class Fir2IrClassifierStorage(
             for ((firTypeParameter, irTypeParameter) in mappedTypeParameters) {
                 typeParameterCache[firTypeParameter] = irTypeParameter
             }
-            declarationStorage.preCacheBuiltinClassMembers(firClass, irClass)
             return symbol
         }
         firClass as FirRegularClass
diff --git a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrTypeConverter.kt b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrTypeConverter.kt
index 5ae50c5ff1c..21ae9985cb8 100644
--- a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrTypeConverter.kt
+++ b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrTypeConverter.kt
@@ -33,12 +33,15 @@ class Fir2IrTypeConverter(
 ) : Fir2IrComponents by components {
 
     internal val classIdToSymbolMap by lazy {
+        // Note: this map must include all base classes, and they should be before derived classes!
         mapOf(
             StandardClassIds.Nothing to irBuiltIns.nothingClass,
+            StandardClassIds.Any to irBuiltIns.anyClass,
             StandardClassIds.Unit to irBuiltIns.unitClass,
             StandardClassIds.Boolean to irBuiltIns.booleanClass,
+            StandardClassIds.CharSequence to irBuiltIns.charSequenceClass,
             StandardClassIds.String to irBuiltIns.stringClass,
-            StandardClassIds.Any to irBuiltIns.anyClass,
+            StandardClassIds.Number to irBuiltIns.numberClass,
             StandardClassIds.Long to irBuiltIns.longClass,
             StandardClassIds.Int to irBuiltIns.intClass,
             StandardClassIds.Short to irBuiltIns.shortClass,
diff --git a/core/compiler.common/src/org/jetbrains/kotlin/name/StandardClassIds.kt b/core/compiler.common/src/org/jetbrains/kotlin/name/StandardClassIds.kt
index 585891e572e..e7ccbda92fd 100644
--- a/core/compiler.common/src/org/jetbrains/kotlin/name/StandardClassIds.kt
+++ b/core/compiler.common/src/org/jetbrains/kotlin/name/StandardClassIds.kt
@@ -49,6 +49,7 @@ object StandardClassIds {
     val UInt = Int.unsignedId()
     val ULong = Long.unsignedId()
 
+    val CharSequence = "CharSequence".baseId()
     val String = "String".baseId()
     val Throwable = "Throwable".baseId()