diff --git a/CHANGELOG.md b/CHANGELOG.md
index 323b9e8..d9b0088 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,7 +22,7 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
-- Nothing.
+- [#153](https://github.com/webimpress/coding-standard/pull/153) fixes calculating spaces before double arrow in arrays - `Arrays\DoubleArrow` sniff.
 
 ## 1.2.2 - 2021-04-12
 
diff --git a/src/WebimpressCodingStandard/Sniffs/Arrays/DoubleArrowSniff.php b/src/WebimpressCodingStandard/Sniffs/Arrays/DoubleArrowSniff.php
index 583f754..f7e6820 100644
--- a/src/WebimpressCodingStandard/Sniffs/Arrays/DoubleArrowSniff.php
+++ b/src/WebimpressCodingStandard/Sniffs/Arrays/DoubleArrowSniff.php
@@ -170,7 +170,10 @@ private function calculateExpectedSpaces(File $phpcsFile, array $indices) : arra
                         true
                     );
 
-                    if ($valueEnd && $tokens[$valueEnd]['line'] !== $tokens[$indices[$k]['index_start']]['line'] - 1) {
+                    if (! isset($res[$i])
+                        && $valueEnd
+                        && $tokens[$valueEnd]['line'] !== $tokens[$indices[$k]['index_start']]['line'] - 1
+                    ) {
                         $res[$i] = $current;
                         $min = $length;
                         $current = $length;
diff --git a/test/Sniffs/Arrays/DoubleArrowUnitTest.1.inc b/test/Sniffs/Arrays/DoubleArrowUnitTest.1.inc
index 55b7be9..8f3994e 100644
--- a/test/Sniffs/Arrays/DoubleArrowUnitTest.1.inc
+++ b/test/Sniffs/Arrays/DoubleArrowUnitTest.1.inc
@@ -68,3 +68,12 @@ $charMap = [
     // Comment
     'c' => 'C', 'd' => 'D',
 ];
+
+$array = [
+    MyClass::class => AliasClass::class,
+
+    Foo::class
+    => Bar::class,
+
+    A::class => Baz::class,
+];
diff --git a/test/Sniffs/Arrays/DoubleArrowUnitTest.1.inc.fixed b/test/Sniffs/Arrays/DoubleArrowUnitTest.1.inc.fixed
index 602e7f4..1330008 100644
--- a/test/Sniffs/Arrays/DoubleArrowUnitTest.1.inc.fixed
+++ b/test/Sniffs/Arrays/DoubleArrowUnitTest.1.inc.fixed
@@ -68,3 +68,12 @@ $charMap = [
     // Comment
     'c' => 'C', 'd' => 'D',
 ];
+
+$array = [
+    MyClass::class => AliasClass::class,
+
+    Foo::class
+    => Bar::class,
+
+    A::class => Baz::class,
+];