Purpose: Children with specific language impairment (SLI) commonly demonstrate many morphological errors in their verbal productions across languages, especially with tense morphemes. This study aims to investigate if the use of recasts in Spanish grammar language treatment decreases the incidence of tense marking errors in Spanish-speaking children with SLI. Method: A 12-year-old Spanish-speaking child with SLI participated in a single case research design (SCRD) study. The subject attended nine intervention sessions to receive a recasting treatment to decrease the number of errors of a target tense morpheme, Results: A visual analysis reveals a significant decrease in the subject’s tense percent errors. Implications: Although the results support recasting as an effective grammar treatment strategy to remediate tense marking errors, in Spanish-speaking children with SLI, further research is needed.