diff --git a/ChangeLog b/ChangeLog
index 517dee2..e2ac3bc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2025-04-16  Bruno Haible  <bruno@clisp.org>
 
+	build: Update after gnulib changed.
+	* gnulib-local/lib/getopt-pfx-ext.h.diff: Remove file.
+	* Makefile.in (SOURCE_FILES): Remove it.
+
 	build: Use more gnulib modules.
 	* autogen.sh (GNULIB_MODULES): Add getopt-gnu.
 	Use directory gnulib-local.
diff --git a/Makefile.in b/Makefile.in
index e5fdedd..4d73577 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -67,8 +67,7 @@ maintainer-clean : force
 SOURCE_FILES = \
   README INSTALL.windows NEWS AUTHORS JOIN-GNU \
   autogen.sh configure.ac aclocal.m4 Makefile.in \
-  Makefile.devel ChangeLog \
-  gnulib-local/lib/getopt-pfx-ext.h.diff
+  Makefile.devel ChangeLog
 # List of distributed files imported from other packages.
 IMPORTED_FILES = \
   COPYING INSTALL \
diff --git a/gnulib-local/lib/getopt-pfx-ext.h.diff b/gnulib-local/lib/getopt-pfx-ext.h.diff
deleted file mode 100644
index 5a0695c..0000000
--- a/gnulib-local/lib/getopt-pfx-ext.h.diff
+++ /dev/null
@@ -1,16 +0,0 @@
-diff --git a/lib/getopt-pfx-ext.h b/lib/getopt-pfx-ext.h
-index 1f2b2d71bf..a61c68c795 100644
---- a/lib/getopt-pfx-ext.h
-+++ b/lib/getopt-pfx-ext.h
-@@ -38,11 +38,9 @@
- # endif
- # undef getopt_long
- # undef getopt_long_only
--# undef option
- # undef _getopt_internal
- # define getopt_long __GETOPT_ID (getopt_long)
- # define getopt_long_only __GETOPT_ID (getopt_long_only)
--# define option __GETOPT_ID (option)
- # define _getopt_internal __GETOPT_ID (getopt_internal)
- 
- /* The system's getopt.h may have already included getopt-ext.h to