diff --git a/glibc.spec b/glibc.spec
index 0037398..d8b5a73 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -1,6 +1,6 @@
-%define glibcsrcdir  glibc-2.26-260-gf4a6be2582
+%define glibcsrcdir  glibc-2.26-290-gb38042f514
 %define glibcversion 2.26.90
-%define glibcrelease 14%{?dist}
+%define glibcrelease 15%{?dist}
 # Pre-release tarballs are pulled in from git using a command that is
 # effectively:
 #
@@ -2060,6 +2060,13 @@ fi
 %endif
 
 %changelog
+* Mon Sep 04 2017 Florian Weimer <fweimer@redhat.com> - 2.26.90-15
+- Auto-sync with upstream master,
+  commit b38042f51430974642616a60afbbf96fd0b98659:
+- Implement tmpfile with O_TMPFILE (swbz#21530)
+- Obsolete pow10 functions
+- math.h: Warn about an already-defined log macro
+
 * Fri Sep 01 2017 Florian Weimer <fweimer@redhat.com> - 2.26.90-14
 - Build glibc with -O2 (following the upstream default).
 - Auto-sync with upstream master,
diff --git a/sources b/sources
index c5585b0..3f42a24 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glibc-2.26-260-gf4a6be2582.tar.gz) = b9c525c55fd77802a110d9c555e1307d217a241f957774d1b5f1cd179279e17a30e2cd5e6d2550bbcd6c23172734cb6c818894f793e0eba29bf93c679349c78a
+SHA512 (glibc-2.26-290-gb38042f514.tar.gz) = 2b3f0ce5bd3f93481855b78401f46f6d2d005f8c0b477f4ed9f6cc4e3da887efd236c6f5f6d0a1163eee3099d110045ac8b8b1d1b9442f3d7f980d5d600f3f7d