diff --git a/src/liblzma/api/lzma/filter.h b/src/liblzma/api/lzma/filter.h
index c3a20998..c4bc69d3 100644
--- a/src/liblzma/api/lzma/filter.h
+++ b/src/liblzma/api/lzma/filter.h
@@ -121,7 +121,7 @@ extern LZMA_API(lzma_bool) lzma_filter_decoder_is_supported(lzma_vli id)
  *                is not NULL.
  *              - LZMA_PROG_ERROR: src or dest is NULL.
  */
-extern LZMA_API(lzma_ret) lzma_filters_dup(const lzma_filter *src,
+extern LZMA_API(lzma_ret) lzma_filters_copy(const lzma_filter *src,
 		lzma_filter *dest, lzma_allocator *allocator);
 
 
diff --git a/src/liblzma/common/filter_common.c b/src/liblzma/common/filter_common.c
index c839e231..055093f7 100644
--- a/src/liblzma/common/filter_common.c
+++ b/src/liblzma/common/filter_common.c
@@ -131,7 +131,7 @@ static const struct {
 
 
 extern LZMA_API(lzma_ret)
-lzma_filters_dup(const lzma_filter *src, lzma_filter *dest,
+lzma_filters_copy(const lzma_filter *src, lzma_filter *dest,
 		lzma_allocator *allocator)
 {
 	if (src == NULL || dest == NULL)