diff --git a/SlevomatCodingStandard/Sniffs/Variables/UnusedVariableSniff.php b/SlevomatCodingStandard/Sniffs/Variables/UnusedVariableSniff.php
index 568d116f0..20a5daae5 100644
--- a/SlevomatCodingStandard/Sniffs/Variables/UnusedVariableSniff.php
+++ b/SlevomatCodingStandard/Sniffs/Variables/UnusedVariableSniff.php
@@ -656,7 +656,8 @@ private function isPartOfStatementAndWithIncrementOrDecrementOperator(File $phpc
 				[T_STRING_CONCAT, T_ECHO, T_RETURN, T_EXIT, T_PRINT, T_COMMA, T_EMPTY, T_EVAL, T_YIELD],
 				Tokens::$operators,
 				Tokens::$assignmentTokens,
-				Tokens::$booleanOperators
+				Tokens::$booleanOperators,
+				Tokens::$castTokens
 			),
 			true
 		);
diff --git a/tests/Sniffs/Variables/data/unusedVariableErrors.php b/tests/Sniffs/Variables/data/unusedVariableErrors.php
index 2f0c25768..41ce0e13c 100644
--- a/tests/Sniffs/Variables/data/unusedVariableErrors.php
+++ b/tests/Sniffs/Variables/data/unusedVariableErrors.php
@@ -128,3 +128,7 @@ function ($b) {
 	--$a;
 	return $b;
 };
+
+function ($s): string {
+	return (string) ++$s;
+};