The Lille striker, a 79th-minute substitute in Paris, fired home from 25 yards in extra time to give Fernando Santos' side a 1-0 victory over the host nation.
Captain Ronaldo had been forced off in tears midway through the first half after sustaining a knee injury following a challenge from Dimitri Payet, but returned to the dugout to give his team-mates a pep talk at the end of 90 minutes.
"Ronaldo told me that I would score the winning goal," the 28-year-old said, as quoted by A Bola. "He gave me that confidence.
"But it was a goal that the whole team worked hard for. We were spectacular during the whole run.
"It's great to be congratulated. I knew that my chance would come from the moment I was called up. Fernando Santos knew of my qualities. He trusted me."
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