diff --git a/source/algorithms.tex b/source/algorithms.tex
index ffe860726a..ecb7f96a8c 100644
--- a/source/algorithms.tex
+++ b/source/algorithms.tex
@@ -348,7 +348,7 @@
   int a[] = {1,2};
   std::for_each(std::execution::par_unseq, std::begin(a), std::end(a), [&](int) {
     std::lock_guard<mutex> guard(m);            // incorrect: \tcode{lock_guard} constructor calls \tcode{m.lock()}
-  ++x;
+    ++x;
   });
 }
 \end{codeblock}