diff --git a/cdecl-10.3.tar.gz b/cdecl-10.3.tar.gz
deleted file mode 100644
index 0730df1..0000000
--- a/cdecl-10.3.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:8b68171ada8e3915f993b471003fa2531b46c925aace4644af2bb438b5931a86
-size 1124535
diff --git a/cdecl-10.4.tar.gz b/cdecl-10.4.tar.gz
new file mode 100644
index 0000000..fe93c4a
--- /dev/null
+++ b/cdecl-10.4.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f2c9523261c7aff6ca1b848bd519b3bfb6d5face9354fe76dc2f3b8338998801
+size 1137962
diff --git a/cdecl.changes b/cdecl.changes
index 4e3ca87..ff361b6 100644
--- a/cdecl.changes
+++ b/cdecl.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Sat Aug 28 13:35:12 UTC 2021 - Jan Engelhardt <jengelh@inai.de>
+
+- Update to release 10.4
+  * Added support for Microsoft calling conventions, MS __declspec,
+    and __asm keywords, and __m64/__m128 types.
+- Drop unbreak-gnulib.diff (solved upstream)
+
 -------------------------------------------------------------------
 Sun Aug 15 16:06:00 UTC 2021 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/cdecl.spec b/cdecl.spec
index 8fd2d2b..7b8b036 100644
--- a/cdecl.spec
+++ b/cdecl.spec
@@ -17,7 +17,7 @@
 
 
 Name:           cdecl
-Version:        10.3
+Version:        10.4
 Release:        0
 Summary:        C/C++ function declaration translator
 License:        GPL-3.0-or-later
@@ -25,7 +25,6 @@ Group:          Development/Languages/C and C++
 URL:            https://github.com/paul-j-lucas/cdecl/
 
 Source:         https://github.com/paul-j-lucas/cdecl/releases/download/cdecl-%version/cdecl-%version.tar.gz
-Patch1:         unbreak-gnulib.diff
 BuildRequires:  bison
 BuildRequires:  flex
 BuildRequires:  ncurses-devel
diff --git a/unbreak-gnulib.diff b/unbreak-gnulib.diff
deleted file mode 100644
index 092aa00..0000000
--- a/unbreak-gnulib.diff
+++ /dev/null
@@ -1,26 +0,0 @@
-From: Jan Engelhardt <jengelh@inai.de>
-Date: 2021-08-15 19:20:30.942589995 +0200
-
-Compiler said _GL_ATTRIBUTE_MALLOC was undefined.
-This was a breaking change in gnulib 48ece5c3f2185f52ab8cd73ceac9bd9f0e01eac6.
----
- lib/stdlib.in.h |    6 ++++++
- 1 file changed, 6 insertions(+)
-
-Index: cdecl-10.3/lib/stdlib.in.h
-===================================================================
---- cdecl-10.3.orig/lib/stdlib.in.h
-+++ cdecl-10.3/lib/stdlib.in.h
-@@ -108,6 +108,12 @@ struct random_data
- #  define _GL_ATTRIBUTE_PURE /* empty */
- # endif
- #endif
-+#ifndef _GL_ATTRIBUTE_MALLOC
-+#define _GL_ATTRIBUTE_MALLOC
-+#endif
-+#ifndef _GL_ATTRIBUTE_DEALLOC_FREE
-+#define _GL_ATTRIBUTE_DEALLOC_FREE
-+#endif
- 
- /* The definition of _Noreturn is copied here.  */
-