diff --git a/src/SongFilter.cxx b/src/SongFilter.cxx
index 8c80c55a7..0cf2b1b2f 100644
--- a/src/SongFilter.cxx
+++ b/src/SongFilter.cxx
@@ -102,7 +102,7 @@ bool
 SongFilter::Item::Match(const Tag &_tag) const
 {
 	bool visited_types[TAG_NUM_OF_ITEM_TYPES];
-	std::fill_n(visited_types, TAG_NUM_OF_ITEM_TYPES, false);
+	std::fill_n(visited_types, size_t(TAG_NUM_OF_ITEM_TYPES), false);
 
 	for (unsigned i = 0; i < _tag.num_items; i++) {
 		visited_types[_tag.items[i]->type] = true;
diff --git a/src/tag/TagConfig.cxx b/src/tag/TagConfig.cxx
index 113a94686..cfdd2e1eb 100644
--- a/src/tag/TagConfig.cxx
+++ b/src/tag/TagConfig.cxx
@@ -40,7 +40,7 @@ TagLoadConfig()
 	if (value == nullptr)
 		return;
 
-	std::fill_n(ignore_tag_items, TAG_NUM_OF_ITEM_TYPES, true);
+	std::fill_n(ignore_tag_items, size_t(TAG_NUM_OF_ITEM_TYPES), true);
 
 	if (StringEqualsCaseASCII(value, "none"))
 		return;