Recent research in macroeconomics has focused on the possibility of indeterminacy since a model with indeterminacy can generate business cycles that are driven by sunspots. However, most of existing works in this area build on the Cobb-Douglas production function, which seems not empirically plausible. This paper departs from unitary values for the elasticity of capital-labour substitution in production and investigates the role of capital-labour substitution elasticity on the occurrence of indeterminacy. I show that in a two-sector model with maintenance expenditures, the minimum degree of externalities required for indeterminacy is much lower than its one-sector predecessor. Moreover, results show that indeterminacy may still occur when the elasticity of labour supply is within the range of empirical plausibility.