diff --git a/src/meshes/parallel_tree.jl b/src/meshes/parallel_tree.jl
index 83d99c4d110..7175ed47743 100644
--- a/src/meshes/parallel_tree.jl
+++ b/src/meshes/parallel_tree.jl
@@ -23,7 +23,7 @@
 #
 # An exception to the 2:1 rule exists for the low-level `refine_unbalanced!`
 # function, which is required for implementing level-wise refinement in a sane
-# way. Also, depth-first ordering *might* not by guaranteed during
+# way. Also, depth-first ordering *might* not be guaranteed during
 # refinement/coarsening operations.
 mutable struct ParallelTree{NDIMS} <: AbstractTree{NDIMS}
     parent_ids::Vector{Int}