diff --git a/common/include/ui.h b/common/include/ui.h
index 0c77a5a9a..7c8958654 100644
--- a/common/include/ui.h
+++ b/common/include/ui.h
@@ -354,8 +354,6 @@ extern void ui_draw_userbox( UI_DIALOG *dlg, UI_GADGET_USERBOX * userbox );
 
 int MenuX( int x, int y, int NumButtons, const char *const text[] );
 
-char **file_getdirlist(int *NumFiles, const char *dir);
-char **file_getfilelist(int *NumDirs, const char *filespec, const char *dir);
 int ui_get_filename( char * filename, const char * Filespec, const char * message  );
 
 
diff --git a/common/ui/file.cpp b/common/ui/file.cpp
index 02fb0175f..778dde01d 100644
--- a/common/ui/file.cpp
+++ b/common/ui/file.cpp
@@ -39,8 +39,7 @@ static int file_sort_func(char **e0, char **e1)
 	return d_stricmp(*e0, *e1);
 }
 
-
-char **file_getdirlist(int *NumDirs, const char *dir)
+static char **file_getdirlist(int *NumDirs, const char *dir)
 {
 	ntstring<PATH_MAX - 1> path;
 	auto dlen = path.copy_if(dir);
@@ -79,7 +78,7 @@ char **file_getdirlist(int *NumDirs, const char *dir)
 	return list;
 }
 
-char **file_getfilelist(int *NumFiles, const char *filespec, const char *dir)
+static char **file_getfilelist(int *NumFiles, const char *filespec, const char *dir)
 {
 	char **list = PHYSFS_enumerateFiles(dir);
 	char **i, **j = list, *ext;