diff --git a/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/kotlinSpacingRules.kt b/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/kotlinSpacingRules.kt
index 018549ddbb0..7b1ddcd70d9 100644
--- a/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/kotlinSpacingRules.kt
+++ b/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/kotlinSpacingRules.kt
@@ -166,6 +166,7 @@ fun createSpacingBuilder(settings: CodeStyleSettings, builderUtil: KotlinSpacing
             afterInside(IDENTIFIER, FUN).spacing(0, 0, 0, false, 0)
 
             around(AS_KEYWORD).spaces(1)
+            around(IS_KEYWORD).spaces(1)
             aroundInside(IDENTIFIER, BINARY_EXPRESSION).spaces(1)
 
             // before LPAR in constructor(): this() {}
diff --git a/idea/testData/formatter/Is.after.kt b/idea/testData/formatter/Is.after.kt
new file mode 100644
index 00000000000..6dd253f5890
--- /dev/null
+++ b/idea/testData/formatter/Is.after.kt
@@ -0,0 +1,5 @@
+fun f() {
+    if (1 is Int) {
+
+    }
+}
\ No newline at end of file
diff --git a/idea/testData/formatter/Is.kt b/idea/testData/formatter/Is.kt
new file mode 100644
index 00000000000..5effe2baebf
--- /dev/null
+++ b/idea/testData/formatter/Is.kt
@@ -0,0 +1,5 @@
+fun f() {
+    if (1   is  Int) {
+
+    }
+}
\ No newline at end of file
diff --git a/idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java b/idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java
index 5aa9b7bd260..0d9432ecd2f 100644
--- a/idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java
+++ b/idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java
@@ -349,6 +349,12 @@ public class FormatterTestGenerated extends AbstractFormatterTest {
             doTest(fileName);
         }
 
+        @TestMetadata("Is.after.kt")
+        public void testIs() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/Is.after.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("KDoc.after.kt")
         public void testKDoc() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/KDoc.after.kt");