diff --git a/glibc-RHEL-21556.patch b/glibc-RHEL-21556.patch
new file mode 100644
index 0000000..31edb08
--- /dev/null
+++ b/glibc-RHEL-21556.patch
@@ -0,0 +1,33 @@
+commit c06c8aeb61708249d8eb0b17a676d16771ea640b
+Author: Dennis Brendel <dbrendel@redhat.com>
+Date:   Mon Jan 15 09:55:37 2024 +0100
+
+    manual: fix order of arguments of memalign and aligned_alloc (Bug 27547)
+    
+    On the summary page the order of the function arguments was reversed, but it is
+    in correct order in the other places of the manual.
+    
+    Reviewed-by: Carlos O'Donell <carlos@redhat.com>
+
+diff --git a/manual/memory.texi b/manual/memory.texi
+index fb875f4c3c..3710d7ec66 100644
+--- a/manual/memory.texi
++++ b/manual/memory.texi
+@@ -1502,7 +1502,7 @@ Space}.
+ Allocate a block of @var{size} bytes, starting on a page boundary.
+ @xref{Aligned Memory Blocks}.
+ 
+-@item void *aligned_alloc (size_t @var{size}, size_t @var{alignment})
++@item void *aligned_alloc (size_t @var{alignment}, size_t @var{size})
+ Allocate a block of @var{size} bytes, starting on an address that is a
+ multiple of @var{alignment}.  @xref{Aligned Memory Blocks}.
+ 
+@@ -1510,7 +1510,7 @@ multiple of @var{alignment}.  @xref{Aligned Memory Blocks}.
+ Allocate a block of @var{size} bytes, starting on an address that is a
+ multiple of @var{alignment}.  @xref{Aligned Memory Blocks}.
+ 
+-@item void *memalign (size_t @var{size}, size_t @var{boundary})
++@item void *memalign (size_t @var{boundary}, size_t @var{size})
+ Allocate a block of @var{size} bytes, starting on an address that is a
+ multiple of @var{boundary}.  @xref{Aligned Memory Blocks}.
+ 
diff --git a/glibc.spec b/glibc.spec
index bf6d66d..a573345 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -155,7 +155,7 @@ end \
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 99%{?dist}
+Release: 100%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -807,6 +807,7 @@ Patch570: glibc-RHEL-16643-4.patch
 Patch571: glibc-RHEL-16643-5.patch
 Patch572: glibc-RHEL-16643-6.patch
 Patch573: glibc-RHEL-19444.patch
+Patch574: glibc-RHEL-21556.patch
 
 ##############################################################################
 # Continued list of core "glibc" package information:
@@ -2965,6 +2966,9 @@ update_gconv_modules_cache ()
 %endif
 
 %changelog
+* Wed Jan 24 2024 Patsy Griffin <patsy@redhat.com> - 2.34-100
+- manual: fix order of arguments of memalign and aligned_alloc (RHEL-21556)
+
 * Tue Jan 09 2024 Arjun Shankar <arjun@redhat.com> - 2.34-99
 - getaddrinfo: Return correct error EAI_MEMORY when out-of-memory (RHEL-19444)