diff --git a/src/commands.cc b/src/commands.cc
index e6008b3d..49555f88 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -424,7 +424,7 @@ void define_command(const CommandParameters& params, Context& context)
         {
              const String& prefix = token_to_complete < params.size() ?
                                     params[token_to_complete] : String();
-             return complete_filename(context, prefix, pos_in_token);
+             return complete_filename(context.options()["ignored_files"].get<String>(), prefix, pos_in_token);
         };
     }
     else if (parser.has_option("shell-completion"))
@@ -790,7 +790,10 @@ void register_commands()
 
     cm.register_commands({"nop"}, [](const CommandParameters&, Context&){});
 
-    PerArgumentCommandCompleter filename_completer({ complete_filename });
+    PerArgumentCommandCompleter filename_completer({
+         [](const Context& context, const String& prefix, ByteCount cursor_pos)
+         { return complete_filename(prefix, context.options()["ignored_files"].get<String>(), cursor_pos); }
+    });
     cm.register_commands({ "e", "edit" }, edit<false>, filename_completer);
     cm.register_commands({ "e!", "edit!" }, edit<true>, filename_completer);
     cm.register_commands({ "w", "write" }, write_buffer, filename_completer);
diff --git a/src/completion.cc b/src/completion.cc
deleted file mode 100644
index 99801cdc..00000000
--- a/src/completion.cc
+++ /dev/null
@@ -1,102 +0,0 @@
-#include "completion.hh"
-
-#include "buffer_manager.hh"
-#include "utils.hh"
-#include "file.hh"
-#include "context.hh"
-#include "debug.hh"
-
-#include <dirent.h>
-#include <algorithm>
-
-#include <boost/regex.hpp>
-
-namespace Kakoune
-{
-
-static boost::regex make_regex_ifp(const String& ex)
-{
-    boost::regex result;
-    if (not ex.empty())
-    {
-        try
-        {
-            result = boost::regex(ex.c_str());
-        }
-        catch(boost::regex_error& err)
-        {
-            write_debug(err.what());
-        }
-    }
-    return result;
-}
-
-CandidateList complete_filename(const Context& context,
-                                const String& prefix,
-                                ByteCount cursor_pos)
-{
-    String real_prefix = parse_filename(prefix.substr(0, cursor_pos));
-    String dirname = "./";
-    String dirprefix;
-    String fileprefix = real_prefix;
-
-    boost::regex ignored_files = make_regex_ifp(context.options()["ignored_files"].get<String>());
-
-    ByteCount dir_end = -1;
-    for (ByteCount i = 0; i < real_prefix.length(); ++i)
-    {
-        if (real_prefix[i] == '/')
-            dir_end = i;
-    }
-    if (dir_end != -1)
-    {
-        dirname = real_prefix.substr(0, dir_end + 1);
-        dirprefix = dirname;
-        fileprefix = real_prefix.substr(dir_end + 1);
-    }
-
-    DIR* dir = opendir(dirname.c_str());
-    auto closeDir = on_scope_end([=]{ closedir(dir); });
-
-    CandidateList result;
-    if (not dir)
-        return result;
-
-    const bool check_ignored_files = not ignored_files.empty() and
-        not boost::regex_match(fileprefix.c_str(), ignored_files);
-
-    boost::regex file_regex = make_regex_ifp(fileprefix);
-    CandidateList regex_result;
-    while (dirent* entry = readdir(dir))
-    {
-        String filename = entry->d_name;
-        if (filename.empty())
-            continue;
-
-        if (check_ignored_files and boost::regex_match(filename.c_str(), ignored_files))
-            continue;
-
-        const bool match_prefix = (filename.substr(0, fileprefix.length()) == fileprefix);
-        const bool match_regex  = not file_regex.empty() and
-            boost::regex_match(filename.c_str(), file_regex);
-
-        if (match_prefix or match_regex)
-        {
-            String name = dirprefix + filename;
-            if (entry->d_type == DT_DIR)
-                name += '/';
-            if (fileprefix.length() != 0 or filename[0] != '.')
-            {
-                if (match_prefix)
-                    result.push_back(escape(name));
-                if (match_regex)
-                    regex_result.push_back(escape(name));
-            }
-        }
-    }
-    CandidateList& real_result = result.empty() ? regex_result : result;
-    std::sort(real_result.begin(), real_result.end());
-    return real_result;
-}
-
-}
diff --git a/src/completion.hh b/src/completion.hh
index 45c25149..06dd3a53 100644
--- a/src/completion.hh
+++ b/src/completion.hh
@@ -26,10 +26,6 @@ struct Completions
         : start(start), end(end) {}
 };
 
-CandidateList complete_filename(const Context& context,
-                                const String& prefix,
-                                ByteCount cursor_pos = -1);
-
 typedef std::function<Completions (const Context&,
                                    const String&, ByteCount)> Completer;
 
diff --git a/src/file.cc b/src/file.cc
index caa93127..2922a835 100644
--- a/src/file.cc
+++ b/src/file.cc
@@ -3,16 +3,16 @@
 #include "buffer.hh"
 #include "buffer_manager.hh"
 #include "assert.hh"
-
 #include "unicode.hh"
+#include "debug.hh"
+#include "completion.hh"
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/mman.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <cstring>
-
+#include <dirent.h>
 
 namespace Kakoune
 {
@@ -199,4 +199,89 @@ String find_file(const String& filename, const memoryview<String>& paths)
     return "";
 }
 
+static boost::regex make_regex_ifp(const String& ex)
+{
+    boost::regex result;
+    if (not ex.empty())
+    {
+        try
+        {
+            result = boost::regex(ex.c_str());
+        }
+        catch(boost::regex_error& err)
+        {
+            write_debug(err.what());
+        }
+    }
+    return result;
+}
+
+std::vector<String> complete_filename(const String& prefix,
+                                      const String& ignored_regex,
+                                      ByteCount cursor_pos)
+{
+    String real_prefix = parse_filename(prefix.substr(0, cursor_pos));
+    String dirname = "./";
+    String dirprefix;
+    String fileprefix = real_prefix;
+
+    boost::regex ignored_files = make_regex_ifp(ignored_regex);
+
+    ByteCount dir_end = -1;
+    for (ByteCount i = 0; i < real_prefix.length(); ++i)
+    {
+        if (real_prefix[i] == '/')
+            dir_end = i;
+    }
+    if (dir_end != -1)
+    {
+        dirname = real_prefix.substr(0, dir_end + 1);
+        dirprefix = dirname;
+        fileprefix = real_prefix.substr(dir_end + 1);
+    }
+
+    DIR* dir = opendir(dirname.c_str());
+    auto closeDir = on_scope_end([=]{ closedir(dir); });
+
+    std::vector<String> result;
+    if (not dir)
+        return result;
+
+    const bool check_ignored_files = not ignored_files.empty() and
+        not boost::regex_match(fileprefix.c_str(), ignored_files);
+
+    boost::regex file_regex = make_regex_ifp(fileprefix);
+    std::vector<String> regex_result;
+    while (dirent* entry = readdir(dir))
+    {
+        String filename = entry->d_name;
+        if (filename.empty())
+            continue;
+
+        if (check_ignored_files and boost::regex_match(filename.c_str(), ignored_files))
+            continue;
+
+        const bool match_prefix = (filename.substr(0, fileprefix.length()) == fileprefix);
+        const bool match_regex  = not file_regex.empty() and
+            boost::regex_match(filename.c_str(), file_regex);
+
+        if (match_prefix or match_regex)
+        {
+            String name = dirprefix + filename;
+            if (entry->d_type == DT_DIR)
+                name += '/';
+            if (fileprefix.length() != 0 or filename[0] != '.')
+            {
+                if (match_prefix)
+                    result.push_back(escape(name));
+                if (match_regex)
+                    regex_result.push_back(escape(name));
+            }
+        }
+    }
+    auto& real_result = result.empty() ? regex_result : result;
+    std::sort(real_result.begin(), real_result.end());
+    return real_result;
+}
+
 }
diff --git a/src/file.hh b/src/file.hh
index 82f2015c..eb2f79ba 100644
--- a/src/file.hh
+++ b/src/file.hh
@@ -32,6 +32,9 @@ Buffer* create_buffer_from_file(const String& filename);
 void write_buffer_to_file(const Buffer& buffer, const String& filename);
 String find_file(const String& filename, const memoryview<String>& paths);
 
+std::vector<String> complete_filename(const String& prefix,
+                                      const String& ignore_regex,
+                                      ByteCount cursor_pos = -1);
 }
 
 #endif // file_hh_INCLUDED