diff --git a/rules-tests/CodingStyle/Rector/ClassMethod/BinaryOpStandaloneAssignsToDirectRector/Fixture/skip_by_ref_from_param_variable.php.inc b/rules-tests/CodingStyle/Rector/ClassMethod/BinaryOpStandaloneAssignsToDirectRector/Fixture/skip_by_ref_from_param_variable.php.inc
new file mode 100644
index 00000000000..1362e570fc3
--- /dev/null
+++ b/rules-tests/CodingStyle/Rector/ClassMethod/BinaryOpStandaloneAssignsToDirectRector/Fixture/skip_by_ref_from_param_variable.php.inc
@@ -0,0 +1,14 @@
+<?php
+
+namespace Rector\Tests\CodingStyle\Rector\ClassMethod\BinaryOpStandaloneAssignsToDirectRector\Fixture;
+
+final class SkipByRefFromParamVariable
+{
+    public function run(&$first, &$second)
+    {
+        $first = 100;
+        $second = 200;
+
+        return $first <=> $second;
+    }
+}
diff --git a/rules/CodingStyle/Rector/ClassMethod/BinaryOpStandaloneAssignsToDirectRector.php b/rules/CodingStyle/Rector/ClassMethod/BinaryOpStandaloneAssignsToDirectRector.php
index e4c9eaf1378..cb8e16ee622 100644
--- a/rules/CodingStyle/Rector/ClassMethod/BinaryOpStandaloneAssignsToDirectRector.php
+++ b/rules/CodingStyle/Rector/ClassMethod/BinaryOpStandaloneAssignsToDirectRector.php
@@ -105,6 +105,15 @@ public function refactor(Node $node): ?Node
             return null;
         }
 
+        $resolveParamByRefVariables = $this->resolveParamByRefVariables($node);
+        if ($this->isNames($binaryOp->left, $resolveParamByRefVariables)) {
+            return null;
+        }
+
+        if ($this->isNames($binaryOp->right, $resolveParamByRefVariables)) {
+            return null;
+        }
+
         $binaryOp->left = $firstVariableAndExprAssign->getExpr();
         $binaryOp->right = $secondVariableAndExprAssign->getExpr();
 
@@ -117,6 +126,32 @@ public function provideMinPhpVersion(): int
         return PhpVersionFeature::VARIADIC_PARAM;
     }
 
+    /**
+     * @return string[]
+     */
+    private function resolveParamByRefVariables(ClassMethod|Function_|Closure $node): array
+    {
+        $paramByRefVariables = [];
+        foreach ($node->params as $param) {
+            if (! $param->var instanceof Variable) {
+                continue;
+            }
+
+            if (! $param->byRef) {
+                continue;
+            }
+
+            $paramName = $this->getName($param->var);
+            if ($paramName === null) {
+                continue;
+            }
+
+            $paramByRefVariables[] = $paramName;
+        }
+
+        return $paramByRefVariables;
+    }
+
     private function matchToVariableAssignExpr(Stmt $stmt): ?VariableAndExprAssign
     {
         if (! $stmt instanceof Expression) {