diff --git a/src/krylov_solvers.jl b/src/krylov_solvers.jl
index 2c6b5aa4e..48b8d774a 100644
--- a/src/krylov_solvers.jl
+++ b/src/krylov_solvers.jl
@@ -1887,7 +1887,7 @@ end
 
 function ksizeof(attribute)
   if isa(attribute, Vector{<:AbstractVector}) && !isempty(attribute)
-    # A vector of vector is a vector of pointers in Julia.
+    # A vector of vectors is a vector of pointers in Julia.
     # All vectors inside a vector have the same size in Krylov.jl
     size_attribute = sizeof(attribute) + length(attribute) * ksizeof(attribute[1])
   else