diff --git a/CHANGELOG.md b/CHANGELOG.md
index f5d35e828e..17886e886f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -58,6 +58,9 @@ An AssertJ style API for testing KtLint rules ([#1444](https://github.com/pinter
 - Fix formatting of a property delegate with a dot-qualified-expression `indent` ([#1340](https://github.com/pinterest/ktlint/ssues/1340))
 - Keep formatting of for-loop in sync with default IntelliJ formatter (`indent`) and a newline in the expression in a for-statement should not force to wrap it `wrapping` ([#1350](https://github.com/pinterest/ktlint/issues/1350))
 - Fix indentation of property getter/setter when the property has an initializer on a separate line `indent` ([#1335](https://github.com/pinterest/ktlint/issues/1335))
+- When `.editorconfig` setting `indentSize` is set to value `tab` then return the default tab width as value for `indentSize` ([#1485](https://github.com/pinterest/ktlint/issues/1485))
+
+
 
 ### Changed
 - Update Kotlin development version to `1.7.0-RC2` and Kotlin version to `1.6.21`.
diff --git a/ktlint-core/src/main/kotlin/com/pinterest/ktlint/core/api/UsesEditorConfigProperties.kt b/ktlint-core/src/main/kotlin/com/pinterest/ktlint/core/api/UsesEditorConfigProperties.kt
index c1115580bf..88308a8c3a 100644
--- a/ktlint-core/src/main/kotlin/com/pinterest/ktlint/core/api/UsesEditorConfigProperties.kt
+++ b/ktlint-core/src/main/kotlin/com/pinterest/ktlint/core/api/UsesEditorConfigProperties.kt
@@ -160,8 +160,9 @@ public object DefaultEditorConfigProperties {
             defaultValue = IndentConfig.DEFAULT_INDENT_CONFIG.tabWidth,
             propertyMapper = { property, _ ->
                 when {
-                    property == null -> IndentConfig.DEFAULT_INDENT_CONFIG.tabWidth
-                    property.isUnset -> -1
+                    property?.isUnset == true -> -1
+                    property?.getValueAs<Int>() == null ->
+                        IndentConfig.DEFAULT_INDENT_CONFIG.tabWidth
                     else -> property.getValueAs()
                 }
             }
diff --git a/ktlint-core/src/test/kotlin/com/pinterest/ktlint/core/UsesEditorConfigPropertiesTest.kt b/ktlint-core/src/test/kotlin/com/pinterest/ktlint/core/UsesEditorConfigPropertiesTest.kt
index 76bb44a67a..3605742806 100644
--- a/ktlint-core/src/test/kotlin/com/pinterest/ktlint/core/UsesEditorConfigPropertiesTest.kt
+++ b/ktlint-core/src/test/kotlin/com/pinterest/ktlint/core/UsesEditorConfigPropertiesTest.kt
@@ -49,6 +49,21 @@ class UsesEditorConfigPropertiesTest {
         assertThat(actual).isEqualTo(-1)
     }
 
+    @Test
+    fun `Issue 1485 - Given that editor config property indent_size is set to value 'tab' then return tabWidth as value via the getEditorConfigValue of the node`() {
+        val testAstNode: ASTNode = DummyHolderElement("some-text")
+        testAstNode.putUserData(
+            KtLint.EDITOR_CONFIG_PROPERTIES_USER_DATA_KEY,
+            createPropertyWithValue(
+                DefaultEditorConfigProperties.indentSizeProperty,
+                "tab"
+            )
+        )
+        val actual = PropertyValueTester().testValue(testAstNode, DefaultEditorConfigProperties.indentSizeProperty)
+
+        assertThat(actual).isEqualTo(IndentConfig.DEFAULT_INDENT_CONFIG.tabWidth)
+    }
+
     @Test
     fun `Given that editor config property indent_size is not set then return the default tabWidth as value via the getEditorConfigValue of the node`() {
         val testAstNode: ASTNode = DummyHolderElement("some-text")