diff --git a/ChangeLog b/ChangeLog
index f6f3ebfceb..acd573cfc3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-11-06  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #22402]
+	* sysdeps/powerpc/bits/floatn.h: Include <bits/long-double.h>.
+	[__NO_LONG_DOUBLE_MATH] (__HAVE_FLOAT128): Define to 0.
+
 2017-11-04  Mike FABIAN  <mfabian@redhat.com>
 
 	* localedata/locales/tpi_PG (LC_TIME): Fix wrong d_fmt, / needs
diff --git a/sysdeps/powerpc/bits/floatn.h b/sysdeps/powerpc/bits/floatn.h
index 44a9434701..a293bfc996 100644
--- a/sysdeps/powerpc/bits/floatn.h
+++ b/sysdeps/powerpc/bits/floatn.h
@@ -20,12 +20,13 @@
 #define _BITS_FLOATN_H
 
 #include <features.h>
+#include <bits/long-double.h>
 
 /* Defined to 1 if the current compiler invocation provides a
    floating-point type with the IEEE 754 binary128 format, and this glibc
    includes corresponding *f128 interfaces for it.  */
 #if defined _ARCH_PWR8 && defined __LITTLE_ENDIAN__ && (_CALL_ELF == 2) \
-    && defined __FLOAT128__
+    && defined __FLOAT128__ && !defined __NO_LONG_DOUBLE_MATH
 # define __HAVE_FLOAT128 1
 #else
 # define __HAVE_FLOAT128 0