diff --git a/reactos/lib/rtl/unicode.c b/reactos/lib/rtl/unicode.c
index b9b9586dfea..ba393d5958b 100644
--- a/reactos/lib/rtl/unicode.c
+++ b/reactos/lib/rtl/unicode.c
@@ -388,7 +388,7 @@ RtlFreeUnicodeString(IN PUNICODE_STRING UnicodeString)
 
     if (UnicodeString->Buffer)
     {
-        RtlpFreeStringMemory(UnicodeString->Buffer, TAG_ASTR);
+        RtlpFreeStringMemory(UnicodeString->Buffer, TAG_USTR);
         RtlZeroMemory(UnicodeString, sizeof(UNICODE_STRING));
     }
 }