diff --git a/CHANGELOG.md b/CHANGELOG.md
index d4288eb0f2..f8e6e18367 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 - @ for escaping keywords (e.g. `struct Foo { @type string }`). 
 - Windows Unicode fixes (V can now work with non-ASCII paths etc on Windows). 
+- Fix mutable args bugs + don't allow primitive arguments to be modified.  
 
 
 ## V 0.1.16 
diff --git a/vlib/os/os.v b/vlib/os/os.v
index f51bbbf10f..0fea036313 100644
--- a/vlib/os/os.v
+++ b/vlib/os/os.v
@@ -833,6 +833,10 @@ pub fn file_last_mod_unix(path string) int {
 fn log(s string) {
 }
 
+pub fn flush_stdout() {
+	C.fflush(stdout)
+} 
+
 pub fn print_backtrace() {
 /* 
 	# void *buffer[100];