diff --git a/pkgs/development/libraries/glibc/builder.sh b/pkgs/development/libraries/glibc/builder.sh
index 177e8482c90a..9d2480d99994 100644
--- a/pkgs/development/libraries/glibc/builder.sh
+++ b/pkgs/development/libraries/glibc/builder.sh
@@ -52,6 +52,11 @@ postInstall() {
     fi
     rm $out/etc/ld.so.cache
     (cd $out/include && ln -s $kernelHeaders/include/* .) || exit 1
+
+    # Workaround for the wrong <semaphore.h> getting installed.  This
+    # appears to be a regression:
+    # http://www.mail-archive.com/debian-glibc@lists.debian.org/msg31543.html
+    cp linuxthreads/semaphore.h $out/include
 }