diff --git a/packages/Php71/src/Rector/BinaryOp/BinaryOpBetweenNumberAndStringRector.php b/packages/Php71/src/Rector/BinaryOp/BinaryOpBetweenNumberAndStringRector.php
index e19baaff7e5e..e81a87e2019b 100644
--- a/packages/Php71/src/Rector/BinaryOp/BinaryOpBetweenNumberAndStringRector.php
+++ b/packages/Php71/src/Rector/BinaryOp/BinaryOpBetweenNumberAndStringRector.php
@@ -8,6 +8,8 @@
 use PhpParser\Node\Expr;
 use PhpParser\Node\Expr\BinaryOp;
 use PhpParser\Node\Expr\BinaryOp\Concat;
+use PhpParser\Node\Expr\Variable;
+use PhpParser\Node\Scalar;
 use PhpParser\Node\Scalar\LNumber;
 use PhpParser\Node\Scalar\String_;
 use PHPStan\Type\Constant\ConstantStringType;
@@ -88,6 +90,11 @@ public function refactor(Node $node): ?Node
 
     private function isStringOrStaticNonNumbericString(Expr $expr): bool
     {
+        // replace only scalar values, not variables/constants/etc.
+        if (! $expr instanceof Scalar && ! $expr instanceof Variable) {
+            return false;
+        }
+
         $value = null;
         $exprStaticType = $this->getStaticType($expr);
 
diff --git a/packages/Php71/tests/Rector/BinaryOp/BinaryOpBetweenNumberAndStringRector/Fixture/skip_constant_value.php.inc b/packages/Php71/tests/Rector/BinaryOp/BinaryOpBetweenNumberAndStringRector/Fixture/skip_constant_value.php.inc
new file mode 100644
index 000000000000..119cd5acd509
--- /dev/null
+++ b/packages/Php71/tests/Rector/BinaryOp/BinaryOpBetweenNumberAndStringRector/Fixture/skip_constant_value.php.inc
@@ -0,0 +1,14 @@
+<?php
+
+namespace Rector\Php71\Tests\Rector\BinaryOp\BinaryOpBetweenNumberAndStringRector\Fixture;
+
+class SkipConstantValue
+{
+    const ROLE_DEFAULT = 'default';
+
+    public function run(int $role)
+    {
+        if ($role !== self::ROLE_DEFAULT) {
+        }
+    }
+}