diff --git a/ChangeLog.alpha b/ChangeLog.alpha
index 3036d8a6a1..03c835e809 100644
--- a/ChangeLog.alpha
+++ b/ChangeLog.alpha
@@ -1,3 +1,7 @@
+2012-03-19  Richard Henderson  <rth@twiddle.net>
+
+	* sysdeps/alpha/fpu/math_private.h: New file.
+
 2012-03-11  Richard Henderson  <rth@twiddle.net>
 
 	* sysdeps/unix/sysv/linux/alpha/bits/socket.h: Remove file.
diff --git a/sysdeps/alpha/fpu/math_private.h b/sysdeps/alpha/fpu/math_private.h
new file mode 100644
index 0000000000..eb2177d78d
--- /dev/null
+++ b/sysdeps/alpha/fpu/math_private.h
@@ -0,0 +1,21 @@
+#ifndef ALPHA_MATH_PRIVATE_H
+#define ALPHA_MATH_PRIVATE_H 1
+
+/* In bits/mathinline.h we define __isnan et al.
+   In sysdeps/alpha/fpu/s_isnan.c we move the identifier out of the way
+   via macro hackery.  In both cases, tell math/math_private.h that
+   we have a local copy of the function.  */
+
+#ifndef __isnan
+# define __isnan  __isnan
+#endif
+#ifndef __isnanf
+# define __isnanf __isnanf
+#endif
+#ifndef __isnanl
+# define __isnanl __isnanl
+#endif
+
+#include_next <math_private.h>
+
+#endif /* ALPHA_MATH_PRIVATE_H */