diff --git a/include/transport/config.h b/include/transport/config.h
index d6900d304d29afa1689b551ec1c789b2d614f149..4ff5b8fa079f1470b405ebffa8a072a6031d4f66 100644
--- a/include/transport/config.h
+++ b/include/transport/config.h
@@ -34,6 +34,7 @@
 #define CONFIG_BOOL(PTR, KEY) (*PTR)[KEY].as<bool>()
 #define CONFIG_LIST(PTR, KEY) (*PTR)[KEY].as<std::list<std::string> >()
 #define CONFIG_VECTOR(PTR, KEY) (*PTR)[KEY].as<std::vector<std::string> >()
+#define CONFIG_HAS_KEY(PTR, KEY) (*PTR).hasKey(KEY)
 
 namespace Transport {
 
@@ -75,6 +76,10 @@ class Config {
 
 		bool reload();
 
+		bool hasKey(const std::string &key) {
+			return m_variables.find(key) != m_variables.end();
+		}
+
 		/// Returns value of variable defined by key.
 		
 		/// For variables in sections you can use "section.variable" key format.