diff --git a/dlls/crypt32/msg.c b/dlls/crypt32/msg.c
index 82bed31c21f..449b944a154 100644
--- a/dlls/crypt32/msg.c
+++ b/dlls/crypt32/msg.c
@@ -1880,7 +1880,7 @@ static BOOL CDecodeMsg_Update(HCRYPTMSG hCryptMsg, const BYTE *pbData,
             }
         }
     }
-    if (ret &&
+    if (ret && fFinal &&
      ((msg->base.open_flags & CMSG_DETACHED_FLAG && msg->base.state ==
      MsgStateDataFinalized) ||
      (!(msg->base.open_flags & CMSG_DETACHED_FLAG) && msg->base.state ==
diff --git a/dlls/crypt32/tests/msg.c b/dlls/crypt32/tests/msg.c
index e9e20180172..aa969e1251a 100644
--- a/dlls/crypt32/tests/msg.c
+++ b/dlls/crypt32/tests/msg.c
@@ -2248,7 +2248,6 @@ static void test_decode_msg_update(void)
     ret = CryptMsgUpdate(msg, NULL, 0, TRUE);
     ok(ret, "CryptMsgUpdate failed: %08x\n", GetLastError());
     ret = CryptMsgUpdate(msg, detachedSignedContent, sizeof(detachedSignedContent), FALSE);
-    todo_wine
     ok(ret, "CryptMsgUpdate failed: %08x\n", GetLastError());
     ret = CryptMsgUpdate(msg, NULL, 0, TRUE);
     ok(ret, "CryptMsgUpdate failed: %08x\n", GetLastError());