diff --git a/strings/knuth_morris_pratt.cpp b/strings/knuth_morris_pratt.cpp
index d116ddcff..d53948d98 100644
--- a/strings/knuth_morris_pratt.cpp
+++ b/strings/knuth_morris_pratt.cpp
@@ -20,6 +20,9 @@
 #endif
 #include <vector>
 
+/** \namespace string_search
+ * \brief String search algorithms
+ */
 namespace string_search {
 /**
  * Generate the partial match table aka failure function for a pattern to