diff --git a/databases/kbibtex/files/patch-src_data_file.cpp b/databases/kbibtex/files/patch-src_data_file.cpp
new file mode 100644
index 000000000000..a036bbe153cd
--- /dev/null
+++ b/databases/kbibtex/files/patch-src_data_file.cpp
@@ -0,0 +1,13 @@
+--- src/data/file.cpp.orig	2015-08-09 18:14:19 UTC
++++ src/data/file.cpp
+@@ -42,8 +42,8 @@ const QString File::ProtectCasing = QLat
+ const QString File::NameFormatting = QLatin1String("NameFormatting");
+ const QString File::ListSeparator = QLatin1String("ListSeparator");
+ 
+-const quint64 valid = 0x08090a0b0c0d0e0f;
+-const quint64 invalid = 0x0102030405060708;
++const quint64 valid = Q_UINT64_C(0x08090a0b0c0d0e0f);
++const quint64 invalid = Q_UINT64_C(0x0102030405060708);
+ 
+ class File::FilePrivate
+ {