diff --git a/mongoose.c b/mongoose.c
index 9228179b..c7ecf932 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -1129,7 +1129,7 @@ static int closedir(DIR *dir) {
   return result;
 }
 
-struct dirent * readdir(DIR *dir) {
+static struct dirent *readdir(DIR *dir) {
   struct dirent *result = 0;
 
   if (dir) {