diff --git a/libraries/stdlib/jdk7/src/kotlin/io/path/PathReadWrite.kt b/libraries/stdlib/jdk7/src/kotlin/io/path/PathReadWrite.kt
index 4692f8618ae..d88c000fd77 100644
--- a/libraries/stdlib/jdk7/src/kotlin/io/path/PathReadWrite.kt
+++ b/libraries/stdlib/jdk7/src/kotlin/io/path/PathReadWrite.kt
@@ -157,8 +157,8 @@ public fun Path.readText(charset: Charset = Charsets.UTF_8): String =
  */
 @SinceKotlin("1.4")
 @ExperimentalPathApi
-public fun Path.writeText(text: String, charset: Charset = Charsets.UTF_8, vararg options: OpenOption) {
-    Files.newOutputStream(this, *options).writer(charset).use { it.write(text) }
+public fun Path.writeText(text: CharSequence, charset: Charset = Charsets.UTF_8, vararg options: OpenOption) {
+    Files.newOutputStream(this, *options).writer(charset).use { it.append(text) }
 }
 
 /**
@@ -169,8 +169,8 @@ public fun Path.writeText(text: String, charset: Charset = Charsets.UTF_8, varar
  */
 @SinceKotlin("1.4")
 @ExperimentalPathApi
-public fun Path.appendText(text: String, charset: Charset = Charsets.UTF_8) {
-    Files.newOutputStream(this, StandardOpenOption.APPEND).writer(charset).use { it.write(text) }
+public fun Path.appendText(text: CharSequence, charset: Charset = Charsets.UTF_8) {
+    Files.newOutputStream(this, StandardOpenOption.APPEND).writer(charset).use { it.append(text) }
 }
 
 /**
diff --git a/libraries/stdlib/jdk7/test/PathReadWriteTest.kt b/libraries/stdlib/jdk7/test/PathReadWriteTest.kt
index d014c86c15d..8b23086fd13 100644
--- a/libraries/stdlib/jdk7/test/PathReadWriteTest.kt
+++ b/libraries/stdlib/jdk7/test/PathReadWriteTest.kt
@@ -15,8 +15,8 @@ class PathReadWriteTest : AbstractPathTest() {
     fun appendText() {
         val file = createTempFile().cleanup()
         file.writeText("Hello\n")
-        file.appendText("World\n")
-        file.writeText("Again", Charsets.US_ASCII, StandardOpenOption.APPEND)
+        file.appendText("World\n" as CharSequence)
+        file.writeText(StringBuilder("Again"), Charsets.US_ASCII, StandardOpenOption.APPEND)
 
         assertEquals("Hello\nWorld\nAgain", file.readText())
         assertEquals(listOf("Hello", "World", "Again"), file.readLines(Charsets.UTF_8))
diff --git a/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-jdk7.txt b/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-jdk7.txt
index 1ce2284c03b..059f0aad4f3 100644
--- a/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-jdk7.txt
+++ b/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-jdk7.txt
@@ -2,8 +2,8 @@ public abstract interface annotation class kotlin/io/path/ExperimentalPathApi :
 }
 
 public final class kotlin/io/path/PathsKt {
-	public static final fun appendText (Ljava/nio/file/Path;Ljava/lang/String;Ljava/nio/charset/Charset;)V
-	public static synthetic fun appendText$default (Ljava/nio/file/Path;Ljava/lang/String;Ljava/nio/charset/Charset;ILjava/lang/Object;)V
+	public static final fun appendText (Ljava/nio/file/Path;Ljava/lang/CharSequence;Ljava/nio/charset/Charset;)V
+	public static synthetic fun appendText$default (Ljava/nio/file/Path;Ljava/lang/CharSequence;Ljava/nio/charset/Charset;ILjava/lang/Object;)V
 	public static final fun fileAttributeViewNotAvailable (Ljava/nio/file/Path;Ljava/lang/Class;)Ljava/lang/Void;
 	public static final fun getExtension (Ljava/nio/file/Path;)Ljava/lang/String;
 	public static final fun getInvariantSeparatorsPath (Ljava/nio/file/Path;)Ljava/lang/String;
@@ -16,8 +16,8 @@ public final class kotlin/io/path/PathsKt {
 	public static final fun relativeTo (Ljava/nio/file/Path;Ljava/nio/file/Path;)Ljava/nio/file/Path;
 	public static final fun relativeToOrNull (Ljava/nio/file/Path;Ljava/nio/file/Path;)Ljava/nio/file/Path;
 	public static final fun relativeToOrSelf (Ljava/nio/file/Path;Ljava/nio/file/Path;)Ljava/nio/file/Path;
-	public static final fun writeText (Ljava/nio/file/Path;Ljava/lang/String;Ljava/nio/charset/Charset;[Ljava/nio/file/OpenOption;)V
-	public static synthetic fun writeText$default (Ljava/nio/file/Path;Ljava/lang/String;Ljava/nio/charset/Charset;[Ljava/nio/file/OpenOption;ILjava/lang/Object;)V
+	public static final fun writeText (Ljava/nio/file/Path;Ljava/lang/CharSequence;Ljava/nio/charset/Charset;[Ljava/nio/file/OpenOption;)V
+	public static synthetic fun writeText$default (Ljava/nio/file/Path;Ljava/lang/CharSequence;Ljava/nio/charset/Charset;[Ljava/nio/file/OpenOption;ILjava/lang/Object;)V
 }
 
 public final class kotlin/jdk7/AutoCloseableKt {