Gap earnings Q2 2017

Pradeep Gaur | Getty Images

A Gap store’s work in progress as it’s going to open soon in Select Citywalk on May 27, 2015 in New Delhi, India.

Clothing retailer Gap reported better-than-expected same-store sales for the second quarter, helped by strong demand for Old Navy products, fewer discounts, and the company’s efforts to better manage inventory.

Shares rallied more than 6 percent in extended-hours trading Thursday.

The company also said its quarterly net income more than doubled and raised its full-year earnings forecast, sending its shares up as much as 12 percent in trading after the bell.

Gap’s same-store sales rose 1 percent in the three months ended July 29, while analysts were expecting sales to be flat year-over-year, according to research firm Consensus Metrix.

Net income rose to $271 million, or 68 cents per share, from $125 million, or 31 cents per share.