diff --git a/include/os.h b/include/os.h
index d9535858a..98716fe99 100644
--- a/include/os.h
+++ b/include/os.h
@@ -198,10 +198,6 @@ extern _X_EXPORT char *
 Xprintf(const char *fmt, ...)
 _X_ATTRIBUTE_PRINTF(1, 2)
     _X_DEPRECATED;
-extern _X_EXPORT char *
-XNFvprintf(const char *fmt, va_list va)
-_X_ATTRIBUTE_PRINTF(1, 0)
-    _X_DEPRECATED;
 
 typedef int (*OsSigWrapperPtr) (int /* sig */ );
 
diff --git a/os/xprintf.c b/os/xprintf.c
index 7ea633245..0a4c1f49f 100644
--- a/os/xprintf.c
+++ b/os/xprintf.c
@@ -166,13 +166,3 @@ Xprintf(const char *format, ...)
     va_end(va);
     return ret;
 }
-
-char *
-XNFvprintf(const char *format, va_list va)
-{
-    char *ret;
-
-    XNFvasprintf(&ret, format, va);
-
-    return ret;
-}