diff --git a/JsonHashTable.cpp b/JsonHashTable.cpp
index a44768f0..f8500afc 100644
--- a/JsonHashTable.cpp
+++ b/JsonHashTable.cpp
@@ -48,6 +48,11 @@ jsmntok_t* JsonHashTable::getToken(char* desiredKey)
 	return 0; 
 }
 
+bool JsonHashTable::containsKey(char* key)
+{
+	return getToken(key) != 0;
+}
+
 JsonArray JsonHashTable::getArray(char* key)
 {
 	return JsonArray(json, getToken(key));
diff --git a/JsonHashTable.h b/JsonHashTable.h
index 57cae390..99633786 100644
--- a/JsonHashTable.h
+++ b/JsonHashTable.h
@@ -21,6 +21,8 @@ public:
 
 	JsonHashTable() {}
 
+	bool containsKey(char* key);
+
 	JsonArray getArray(char* key);
 	bool getBool(char* key);
 	double getDouble(char* key);