diff --git a/packages/BetterPhpDocParser/src/PhpDocInfo/PhpDocInfo.php b/packages/BetterPhpDocParser/src/PhpDocInfo/PhpDocInfo.php
index cb8bb0c24fb..d804436bb7c 100644
--- a/packages/BetterPhpDocParser/src/PhpDocInfo/PhpDocInfo.php
+++ b/packages/BetterPhpDocParser/src/PhpDocInfo/PhpDocInfo.php
@@ -157,6 +157,19 @@ final class PhpDocInfo
         return $this->staticTypeMapper->mapPHPStanPhpDocTypeToPHPStanType($paramTagValue, $this->node);
     }
 
+    /**
+     * @return Type[]
+     */
+    public function getParamTypes(): array
+    {
+        $paramTypes = [];
+        foreach ($this->getParamTagValues() as $paramTagValue) {
+            $paramTypes[] = $this->staticTypeMapper->mapPHPStanPhpDocTypeToPHPStanType($paramTagValue, $this->node);
+        }
+
+        return $paramTypes;
+    }
+
     public function getVarType(): Type
     {
         $varTagValue = $this->getVarTagValue();
diff --git a/packages/CodingStyle/src/Rector/Use_/RemoveUnusedAliasRector.php b/packages/CodingStyle/src/Rector/Use_/RemoveUnusedAliasRector.php
index a4cc064547b..a2526b1355b 100644
--- a/packages/CodingStyle/src/Rector/Use_/RemoveUnusedAliasRector.php
+++ b/packages/CodingStyle/src/Rector/Use_/RemoveUnusedAliasRector.php
@@ -18,10 +18,12 @@ use PhpParser\Node\Stmt\TraitUse;
 use PhpParser\Node\Stmt\Use_;
 use PhpParser\Node\Stmt\UseUse;
 use PhpParser\NodeVisitor\NameResolver;
+use Rector\BetterPhpDocParser\PhpDocInfo\PhpDocInfo;
 use Rector\CodingStyle\Imports\ShortNameResolver;
 use Rector\CodingStyle\Naming\ClassNaming;
 use Rector\Exception\ShouldNotHappenException;
 use Rector\NodeTypeResolver\Node\AttributeKey;
+use Rector\PHPStan\Type\AliasedObjectType;
 use Rector\Rector\AbstractRector;
 use Rector\RectorDefinition\CodeSample;
 use Rector\RectorDefinition\RectorDefinition;
@@ -306,6 +308,27 @@ PHP
                 return;
             }
 
+            /** @var PhpDocInfo $phpDocInfo */
+            $phpDocInfo = $this->getPhpDocInfo($node);
+            if ($phpDocInfo->getVarType()) {
+                $varType = $phpDocInfo->getVarType();
+                if ($varType instanceof AliasedObjectType) {
+                    $possibleDocAliases[] = $varType->getClassName();
+                }
+
+                $returnType = $phpDocInfo->getReturnType();
+                if ($returnType instanceof AliasedObjectType) {
+                    $possibleDocAliases[] = $returnType->getClassName();
+                }
+
+                foreach ($phpDocInfo->getParamTypes() as $paramType) {
+                    if ($paramType instanceof AliasedObjectType) {
+                        $possibleDocAliases[] = $paramType->getClassName();
+                    }
+                }
+            }
+
+            // e.g. "use Dotrine\ORM\Mapping as ORM" etc.
             $matches = Strings::matchAll($node->getDocComment()->getText(), '#\@(?<possible_alias>\w+)(\\\\)?#s');
             foreach ($matches as $match) {
                 $possibleDocAliases[] = $match['possible_alias'];
@@ -336,6 +359,10 @@ PHP
         $shortNames = $this->shortNameResolver->resolveForNode($use);
         foreach ($shortNames as $alias => $useImport) {
             $shortName = $this->classNaming->getShortName($useImport);
+            if ($shortName === $alias) {
+                continue;
+            }
+
             $useNamesAliasToName[$shortName][] = $alias;
         }
 
diff --git a/packages/CodingStyle/tests/Rector/Use_/RemoveUnusedAliasRector/Fixture/keep_used_doc_param.php.inc b/packages/CodingStyle/tests/Rector/Use_/RemoveUnusedAliasRector/Fixture/keep_used_doc_param.php.inc
new file mode 100644
index 00000000000..d79a61b079a
--- /dev/null
+++ b/packages/CodingStyle/tests/Rector/Use_/RemoveUnusedAliasRector/Fixture/keep_used_doc_param.php.inc
@@ -0,0 +1,17 @@
+<?php
+
+namespace Rector\CodingStyle\Tests\Rector\Use_\RemoveUnusedAliasRector\Fixture;
+
+use SplFileInfo as NativeSplFileInfo;
+use Symfony\Component\Finder\SplFileInfo;
+
+final class KeepUsedDocParam
+{
+    /**
+     * @param SplFileInfo $type
+     */
+    public function run($type): void
+    {
+        $splFileInfo = new NativeSplFileInfo('tests/Posts/Year2018/Exceptions/Source/some_file.txt');
+    }
+}
diff --git a/packages/CodingStyle/tests/Rector/Use_/RemoveUnusedAliasRector/Fixture/keep_used_spl_file_info.php.inc b/packages/CodingStyle/tests/Rector/Use_/RemoveUnusedAliasRector/Fixture/keep_used_spl_file_info.php.inc
new file mode 100644
index 00000000000..4fd2ac4e712
--- /dev/null
+++ b/packages/CodingStyle/tests/Rector/Use_/RemoveUnusedAliasRector/Fixture/keep_used_spl_file_info.php.inc
@@ -0,0 +1,17 @@
+<?php
+
+namespace Rector\CodingStyle\Tests\Rector\Use_\RemoveUnusedAliasRector\Fixture;
+
+use SplFileInfo as NativeSplFileInfo;
+use Symfony\Component\Finder\SplFileInfo;
+
+final class KeepUsedSplFileInfo
+{
+    public function testSplFileInfo(): void
+    {
+        $splFileInfo = new NativeSplFileInfo('tests/Posts/Year2018/Exceptions/Source/some_file.txt');
+
+        /** @var SplFileInfo $file */
+        $file = array_pop($files);
+    }
+}
diff --git a/packages/CodingStyle/tests/Rector/Use_/RemoveUnusedAliasRector/RemoveUnusedAliasRectorTest.php b/packages/CodingStyle/tests/Rector/Use_/RemoveUnusedAliasRector/RemoveUnusedAliasRectorTest.php
index d52750d3455..8139e2866b2 100644
--- a/packages/CodingStyle/tests/Rector/Use_/RemoveUnusedAliasRector/RemoveUnusedAliasRectorTest.php
+++ b/packages/CodingStyle/tests/Rector/Use_/RemoveUnusedAliasRector/RemoveUnusedAliasRectorTest.php
@@ -22,6 +22,8 @@ final class RemoveUnusedAliasRectorTest extends AbstractRectorTestCase
     {
         yield [__DIR__ . '/Fixture/fixture.php.inc'];
         yield [__DIR__ . '/Fixture/used.php.inc'];
+        yield [__DIR__ . '/Fixture/keep_used_spl_file_info.php.inc'];
+        yield [__DIR__ . '/Fixture/keep_used_doc_param.php.inc'];
         yield [__DIR__ . '/Fixture/class_name.php.inc'];
         yield [__DIR__ . '/Fixture/no_namespace.php.inc'];
         yield [__DIR__ . '/Fixture/no_namespace_class_name.php.inc'];