diff --git a/ktoml-core/build.gradle.kts b/ktoml-core/build.gradle.kts
index a96770be..bca8d27b 100644
--- a/ktoml-core/build.gradle.kts
+++ b/ktoml-core/build.gradle.kts
@@ -28,6 +28,7 @@ kotlin {
     macosX64()
     macosArm64()
     ios()
+    iosSimulatorArm64()
 
     sourceSets {
         all {
diff --git a/ktoml-core/src/iosSimulatorArm64Main/kotlin/com/akuleshov7/ktoml/utils/UtilsSimulator.kt b/ktoml-core/src/iosSimulatorArm64Main/kotlin/com/akuleshov7/ktoml/utils/UtilsSimulator.kt
new file mode 100644
index 00000000..458f07f2
--- /dev/null
+++ b/ktoml-core/src/iosSimulatorArm64Main/kotlin/com/akuleshov7/ktoml/utils/UtilsSimulator.kt
@@ -0,0 +1,15 @@
+/**
+ * Specific implementation for utilities
+ */
+
+package com.akuleshov7.ktoml.utils
+
+@Suppress("MAGIC_NUMBER")
+internal actual fun StringBuilder.appendCodePointCompat(codePoint: Int): StringBuilder = when (codePoint) {
+    in 0 until Char.MIN_SUPPLEMENTARY_CODE_POINT -> append(codePoint.toChar())
+    in Char.MIN_SUPPLEMENTARY_CODE_POINT..Char.MAX_CODE_POINT -> {
+        append(Char.MIN_HIGH_SURROGATE + ((codePoint - 0x10000) shr 10))
+        append(Char.MIN_LOW_SURROGATE + (codePoint and 0x3ff))
+    }
+    else -> throw IllegalArgumentException()
+}