The present disclosure relates to compositions and methods useful for the production of heterologous proteins with increased N-glycosylation site occupancy in filamentous fungal cells, such as Trichoderma cells. More specifically, the invention provides a filamentous fungal cell comprising i. one or more mutation that reduces or eliminates one or more endogenous protease activity compared to a parental filamentous fungal cell which does not have said mutation(s), ii. a polynucleotide encoding a heterologous catalytic subunit of oligosaccharyl transferase, and iii. a polynucleotide encoding a heterologous glycoprotein, wherein said catalytic subunit of oligosaccharyl transferase is selected from Leishmania oligosaccharyl transferase catalytic subunits.