diff --git a/src/fd/fmt.cpp b/src/fd/fmt.cpp
index 217949d..51fdcb1 100644
--- a/src/fd/fmt.cpp
+++ b/src/fd/fmt.cpp
@@ -22,7 +22,7 @@
 {
     if (buf.size() > 0)
     {
-        stdplus::fd::write(fd, buf);
+        stdplus::fd::writeExact(fd, buf);
         buf.clear();
     }
 }