diff --git a/ChangeLog b/ChangeLog
index 9dd87eebb8..3cf598575f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2018-06-18  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #23303]
+	* sysdeps/powerpc/powerpc64/le/Makefile
+	(CFLAGS-tst-strtod-nan-sign.c): Add -mfloat128.
+	(CFLAGS-tst-wcstod-nan-sign.c): Likewise.
+	(gnulib-tests): Also add $(f128-loader-link) for
+	tst-strtod-nan-sign abd tst-wcstod-nan-sign.
+
 2018-06-15  Samuel Thibault  <samuel.thibault@ens-lyon.org>
 
 	* include/sys/sendfile.h (__sendfile64): Declare hidden prototype.
diff --git a/sysdeps/powerpc/powerpc64/le/Makefile b/sysdeps/powerpc/powerpc64/le/Makefile
index 14d39e28b1..f59db1ca3c 100644
--- a/sysdeps/powerpc/powerpc64/le/Makefile
+++ b/sysdeps/powerpc/powerpc64/le/Makefile
@@ -54,10 +54,13 @@ CFLAGS-tst-strtod6.c += -mfloat128
 CFLAGS-tst-strfrom.c += -mfloat128
 CFLAGS-tst-strfrom-locale.c += -mfloat128
 CFLAGS-strfrom-skeleton.c += -mfloat128
+CFLAGS-tst-strtod-nan-sign.c += -mfloat128
+CFLAGS-tst-wcstod-nan-sign.c += -mfloat128
 $(foreach test,bug-strtod bug-strtod2 bug-strtod2 tst-strtod-round \
 tst-wcstod-round tst-strtod6 tst-strrom tst-strfrom-locale \
 tst-strtod-nan-locale tst-wcstod-nan-locale \
-strfrom-skeleton,$(objpfx)$(test)): gnulib-tests += $(f128-loader-link)
+strfrom-skeleton tst-strtod-nan-sign tst-wcstod-nan-sign, \
+$(objpfx)$(test)): gnulib-tests += $(f128-loader-link)
 
 # When building glibc with support for _Float128, the powers of ten tables in
 # fpioconst.c and in the string conversion functions must be extended.  Some