diff --git a/local/recipes/kde/kf6-kio/source/src/gui/previewjob.cpp b/local/recipes/kde/kf6-kio/source/src/gui/previewjob.cpp
index f5a539bb53..23ef5554b5 100644
--- a/local/recipes/kde/kf6-kio/source/src/gui/previewjob.cpp
+++ b/local/recipes/kde/kf6-kio/source/src/gui/previewjob.cpp
@@ -14,7 +14,7 @@
 #include "standardthumbnailjob_p.h"
 #include "statjob.h"
 
-#if defined(Q_OS_UNIX) && !defined(Q_OS_ANDROID) && !defined(Q_OS_HAIKU) && !defined(Q_OS_REDOX)
+#if defined(Q_OS_UNIX) && !defined(Q_OS_ANDROID) && !defined(Q_OS_HAIKU)
 #define WITH_SHM 1
 #else
 #define WITH_SHM 0