diff --git a/src/insert_completer.cc b/src/insert_completer.cc
index d54b85e3..c2659579 100644
--- a/src/insert_completer.cc
+++ b/src/insert_completer.cc
@@ -159,9 +159,9 @@ InsertCompletion complete_word(const SelectionList& sels, const OptionManager& o
     std::sort(matches.begin(), matches.end());
     matches.erase(std::unique(matches.begin(), matches.end()), matches.end());
 
-    const auto longest = std::accumulate(matches.begin(), matches.end(), 0_char,
-                                         [](const CharCount& lhs, const RankedMatchAndBuffer& rhs)
-                                         { return std::max(lhs, rhs.candidate().char_length()); });
+    const auto longest = accumulate(matches, 0_char,
+                                    [](const CharCount& lhs, const RankedMatchAndBuffer& rhs)
+                                    { return std::max(lhs, rhs.candidate().char_length()); });
 
     InsertCompletion::CandidateList candidates;
     candidates.reserve(matches.size());
diff --git a/src/shared_string.cc b/src/shared_string.cc
index eb12ca27..74c6c106 100644
--- a/src/shared_string.cc
+++ b/src/shared_string.cc
@@ -6,9 +6,9 @@ namespace Kakoune
 
 StringDataPtr StringData::create(ArrayView<const StringView> strs)
 {
-    const int len = std::accumulate(strs.begin(), strs.end(), 0,
-                                    [](int l, StringView s)
-                                    { return l + (int)s.length(); });
+    const int len = accumulate(strs, 0, [](int l, StringView s) {
+                        return l + (int)s.length();
+                    });
     void* ptr = StringData::operator new(sizeof(StringData) + len + 1);
     auto* res = new (ptr) StringData(len);
     auto* data = reinterpret_cast<char*>(res + 1);