ext/duckdb/connection.h in duckdb-0.0.5 vs ext/duckdb/connection.h in duckdb-0.0.6

@@ -5,9 +5,11 @@
     duckdb_connection con;
 };
 
 typedef struct _rubyDuckDBConnection rubyDuckDBConnection;
 
+VALUE cDuckDBConnection;
+
 void init_duckdb_connection(void);
 VALUE create_connection(VALUE oDuckDBDatabase);
 
 #endif