diff --git a/src/lib/config/config_data.h b/src/lib/config/config_data.h
index 197d319176..3fdbc25ce2 100644
--- a/src/lib/config/config_data.h
+++ b/src/lib/config/config_data.h
@@ -32,7 +32,7 @@ public:
     DataNotFoundError(const char* file, size_t line, const std::string& what) :
         isc::Exception(file, line, what) {}
 };
-    
+
 class ConfigData {
 public:
     /// Constructs a ConfigData option with no specification and an