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-rw-r--r--doc/lua-filters.md2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/lua-filters.md b/doc/lua-filters.md
index bb24723ce..e2a65fe1e 100644
--- a/doc/lua-filters.md
+++ b/doc/lua-filters.md
@@ -109,7 +109,7 @@ element filtering function. In other words, filter entries will
be called for each corresponding element in the document,
getting the respective element as input.
-The return of a filter function must one of the following:
+The return of a filter function must be one of the following:
- nil: this means that the object should remain unchanged.
- a pandoc object: this must be of the same type as the input