diff --git a/kwallet-5.29.0/src/runtime/kwalletd/backend/blowfish.cc.old b/kwallet-5.29.0/src/runtime/kwalletd/backend/blowfish.cc
--- a/kwallet-5.29.0/src/runtime/kwalletd/backend/blowfish.cc.old
+++ b/kwallet-5.29.0/src/runtime/kwalletd/backend/blowfish.cc
@@ -31,9 +31,7 @@
 
 #include "blowfishtables.h"
 
-// DO NOT INCLUDE THIS. IT BREAKS KWALLET.
-// We need to live with -Wundef until someone really figures out the problem.
-//#include <QtCore/qglobal.h> // for Q_BYTE_ORDER and friends
+#include <QtGlobal> // for Q_BYTE_ORDER and friends
 
 BlowFish::BlowFish()
 {
@@ -135,7 +133,7 @@
     return init();
 }
 
-#if Q_BYTE_ORDER == Q_BIG_ENDIAN
+#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
 #define shuffle(x) do {             \
         uint32_t r = x;             \
         x  = (r & 0xff000000) >> 24;    \
@@ -154,12 +152,12 @@
     }
 
     for (int i = 0; i < len / _blksz; i++) {
-#if Q_BYTE_ORDER == Q_BIG_ENDIAN
+#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
         shuffle(*d);
         shuffle(*(d + 1));
 #endif
         encipher(d, d + 1);
-#if Q_BYTE_ORDER == Q_BIG_ENDIAN
+#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
         shuffle(*d);
         shuffle(*(d + 1));
 #endif
@@ -178,12 +176,12 @@
     }
 
     for (int i = 0; i < len / _blksz; i++) {
-#if Q_BYTE_ORDER == Q_BIG_ENDIAN
+#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
         shuffle(*d);
         shuffle(*(d + 1));
 #endif
         decipher(d, d + 1);
-#if Q_BYTE_ORDER == Q_BIG_ENDIAN
+#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
         shuffle(*d);
         shuffle(*(d + 1));
 #endif