The 19-year-old was called into the latest Spain squad, however, and made his debut for La Roja in their 5-1 win over Macedonia last night.
"He asked me, 'Papa, I don't know what to do'. I told him, go with whoever calls you up first," Mohammed El Haddadi told El Partido de las 12.
"Spain called him up first and took him. If Morocco had called first, he would've gone with them. I always told him, whoever calls you up first, you go with them.
"I'm very happy for him. I never knew he'd get this far. I never thought he'd get this far so quickly, but that's how things go and it's great."
Munir played the final 15 minutes of the Euro 2016 qualifier last night.