diff --git a/rules/dead-code/src/UselessIfCondBeforeForeachDetector.php b/rules/dead-code/src/UselessIfCondBeforeForeachDetector.php
index fbd3cc5a8c15..cb868dc9f3b5 100644
--- a/rules/dead-code/src/UselessIfCondBeforeForeachDetector.php
+++ b/rules/dead-code/src/UselessIfCondBeforeForeachDetector.php
@@ -12,7 +12,9 @@
 use PhpParser\Node\Expr\BooleanNot;
 use PhpParser\Node\Expr\Empty_;
 use PhpParser\Node\Stmt\If_;
+use PHPStan\Type\MixedType;
 use Rector\Core\PhpParser\Printer\BetterStandardPrinter;
+use Rector\NodeTypeResolver\NodeTypeResolver;
 
 final class UselessIfCondBeforeForeachDetector
 {
@@ -21,9 +23,15 @@ final class UselessIfCondBeforeForeachDetector
      */
     private $betterStandardPrinter;
 
-    public function __construct(BetterStandardPrinter $betterStandardPrinter)
+    /**
+     * @var NodeTypeResolver
+     */
+    private $nodeTypeResolver;
+
+    public function __construct(BetterStandardPrinter $betterStandardPrinter, NodeTypeResolver $nodeTypeResolver)
     {
         $this->betterStandardPrinter = $betterStandardPrinter;
+        $this->nodeTypeResolver = $nodeTypeResolver;
     }
 
     /**
@@ -44,7 +52,14 @@ public function isMatchingNotEmpty(If_ $if, Expr $foreachExpr): bool
         /** @var Empty_ $empty */
         $empty = $cond->expr;
 
-        return $this->betterStandardPrinter->areNodesEqual($empty->expr, $foreachExpr);
+        if (! $this->betterStandardPrinter->areNodesEqual($empty->expr, $foreachExpr)) {
+            return false;
+        }
+
+        // is array though?
+        $arrayType = $this->nodeTypeResolver->resolve($empty->expr);
+
+        return ! $arrayType instanceof MixedType;
     }
 
     /**
diff --git a/rules/dead-code/tests/Rector/If_/RemoveUnusedNonEmptyArrayBeforeForeachRector/Fixture/skip_dim_fetch.php.inc b/rules/dead-code/tests/Rector/If_/RemoveUnusedNonEmptyArrayBeforeForeachRector/Fixture/skip_dim_fetch.php.inc
new file mode 100644
index 000000000000..d11d728dabfe
--- /dev/null
+++ b/rules/dead-code/tests/Rector/If_/RemoveUnusedNonEmptyArrayBeforeForeachRector/Fixture/skip_dim_fetch.php.inc
@@ -0,0 +1,19 @@
+<?php
+
+namespace Rector\DeadCode\Tests\Rector\If_\RemoveUnusedNonEmptyArrayBeforeForeachRector\Fixture;
+
+class SkipDimFetch
+{
+    /**
+     * @param mixed[] $options
+     */
+    public function run(array $options)
+    {
+        if (! empty($options['-t'])) {
+            foreach ($options['-t'] as $branch) {
+                $args[] = '-t';
+                $args[] = $branch;
+            }
+        }
+    }
+}