diff --git a/runtime/src/main/kotlin/kotlin/text/StringNumberConversions.kt b/runtime/src/main/kotlin/kotlin/text/StringNumberConversions.kt
index 077bee7be14..e18b9eb0550 100644
--- a/runtime/src/main/kotlin/kotlin/text/StringNumberConversions.kt
+++ b/runtime/src/main/kotlin/kotlin/text/StringNumberConversions.kt
@@ -56,7 +56,7 @@ public inline fun Long.toString(radix: Int): String = longToString(this, checkRa
  * Returns `true` if the contents of this string is equal to the word "true", ignoring case, and `false` otherwise.
  */
 @kotlin.internal.InlineOnly
-public inline fun String.toBoolean(): Boolean = this == "true"
+public inline fun String.toBoolean(): Boolean = this.equals("true", ignoreCase = true)
 
 @SymbolName("Kotlin_String_parseByte")
 external private fun parseByte(value: String, radix: Int): Byte