diff --git a/config.h b/config.h
index dd92e34..8167961 100644
--- a/config.h
+++ b/config.h
@@ -56,7 +56,7 @@
 
 #define USAGE_DATABASES "auto" USAGE_NAME_SQLITE USAGE_NAME_POSTGRESQL USAGE_NAME_LEVELDB USAGE_NAME_REDIS
 
-#if !USE_SQLITE3 && !USE_LEVELDB && !USE_REDIS
+#if !USE_SQLITE3 && !USE_POSTGRESQL && !USE_LEVELDB && !USE_REDIS
 #error No database backends configured !
 #endif