diff --git a/docs/known-issues.txt b/docs/known-issues.txt
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+Glibc does not build: asm/page.h not found
+
+As of linux-2.6.25, asm/page.h is no longer exported.
+This means the glibc up to and including 2.6.1 will not build against headers
+exported from linux-2.6.25 and up. Status of glibc 2.7 and above is unknown.