diff --git a/src/utils.cpp b/src/utils.cpp
index e151417..b3d3601 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -189,10 +189,11 @@
 
     std::string operator()(const bool& data) const
     {
-        if (data)
+        if (data) {
             return "true";
-        else
+        } else {
             return "false";
+        }
     }
 
     template <typename T>