diff --git a/src/libs/utils/mimetypes2/mimedatabase.cpp b/src/libs/utils/mimetypes2/mimedatabase.cpp
index 61d97f5e8d9..9ac9b5270df 100644
--- a/src/libs/utils/mimetypes2/mimedatabase.cpp
+++ b/src/libs/utils/mimetypes2/mimedatabase.cpp
@@ -84,7 +84,7 @@ static QStringList locateMimeDirectories()
 }
 #endif
 
-#if defined(Q_OS_UNIX) && !defined(Q_OS_NACL) && !defined(Q_OS_INTEGRITY)
+#if defined(Q_OS_UNIX) && !defined(Q_OS_INTEGRITY)
 #  define QT_USE_MMAP
 #endif