diff --git a/cli/cmdlineparser.h b/cli/cmdlineparser.h
index ef8c11c38..74160c40d 100644
--- a/cli/cmdlineparser.h
+++ b/cli/cmdlineparser.h
@@ -43,7 +43,7 @@ public:
      * @param settings Settings instance that will be modified according to
      * options user has given.
      */
-    CmdLineParser(Settings *settings);
+    explicit CmdLineParser(Settings *settings);
 
     /**
      * Parse given command line.
diff --git a/cli/pathmatch.h b/cli/pathmatch.h
index 9def070f8..411a79419 100644
--- a/cli/pathmatch.h
+++ b/cli/pathmatch.h
@@ -35,7 +35,7 @@ public:
      * The constructor.
      * @param masks List of masks.
      */
-    PathMatch(const std::vector<std::string> &masks);
+    explicit PathMatch(const std::vector<std::string> &masks);
 
     /**
      * @brief Match path against list of masks.