Inflectional morphology causes persistent difficulties for second language (L2) learners (Montrul, Silvina & Kim Potowski. 2007. Command of gender agreement in school-age Spanish-English bilingual children. International Journal of Bilingualism 11(3). 301–328; Montrul, Silvina, Israel de la Fuente, Justin Davidson & Rebecca Foote. 2013. The role of experience in the acquisition and production of diminutives and gender in Spanish: Evidence from L2 learners and heritage speakers. Second Language Research 29(1). 87–118). Learners operate with a default gender value, and overgeneralize the masculine forms of determiners and modifiers (White, Lydia, Elena Valenzuela, Martyna Kozlowska-Macgregor & Ingrid Leung. 2004. Gender and number agreement in nonnative Spanish. Applied Psycholinguistics 25(1). 105–133; Schlig 2003). 111 essays written were collected containing 799 correct uses and 281 errors from Dutch students whose written ability in Spanish is A2 (Common European Framework). The results show that singular masculine nominal agreement marking at the determiner is significantly better produced by Dutch L2 learners of Spanish than when the marking of nominal agreement is plural, feminine or at the adjective. This study corroborates the previous results where learners operate with a default gender value and overgeneralize the masculine forms of determiners. Also these results show that L2 learners of Spanish are significantly less accurate in gender agreement with adjectives than with determiners.