diff --git a/src/pgsql.c b/src/pgsql.c
index 01f84c2..907e51d 100644
--- a/src/pgsql.c
+++ b/src/pgsql.c
@@ -18,6 +18,7 @@
 #include <sys/queue.h>
 
 #include <libpq-fe.h>
+#include <postgresql/pg_config.h>
 
 #include "kore.h"
 #include "http.h"