diff --git a/ext/mysql2/statement.c b/ext/mysql2/statement.c
index ca63df948..d7fffcc6b 100644
--- a/ext/mysql2/statement.c
+++ b/ext/mysql2/statement.c
@@ -479,7 +479,7 @@ static VALUE fields(VALUE self) {
 #endif
 
   metadata = mysql_stmt_result_metadata(stmt);
-  if (metadata == NULL) {
+  if (!metadata) {
     return rb_ary_new();
   }
   fields      = mysql_fetch_fields(metadata);