diff --git a/xrootd-32bit-format.patch b/xrootd-32bit-format.patch
new file mode 100644
index 0000000..14e912b
--- /dev/null
+++ b/xrootd-32bit-format.patch
@@ -0,0 +1,32 @@
+From e5fedffb0d0e4d479e8a152ffb6c89eebab76c0c Mon Sep 17 00:00:00 2001
+From: Mattias Ellert <mattias.ellert@physics.uu.se>
+Date: Thu, 25 Feb 2021 17:19:13 +0100
+Subject: [PATCH] Fix format error on 32 bit architectures
+
+error: format '%ld' expects argument of type 'long int', but argument
+3 has type 'uint64_t' {aka 'long long unsigned int'}
+---
+ src/XrdClHttp/Posix.cc | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/XrdClHttp/src/XrdClHttp/Posix.cc b/src/XrdClHttp/src/XrdClHttp/Posix.cc
+index cdd3317..4c47382 100644
+--- a/src/XrdClHttp/src/XrdClHttp/Posix.cc
++++ b/src/XrdClHttp/src/XrdClHttp/Posix.cc
+@@ -341,11 +341,11 @@ std::pair<int, XRootDStatus> _PRead(Davix::DavPosix& davix_client, DAVIX_FD* fd,
+   Davix::DavixError* err = nullptr;
+   int num_bytes_read;
+   if (no_pread) { // continue reading from the current offset position
+-    printf("Posix::Read(size=%d)\n", size);
++    printf("Posix::Read(size=%u)\n", size);
+     num_bytes_read = davix_client.read(fd, buffer, size, &err); 
+   }
+   else {
+-    printf("Posix::PRead(size=%d, offset=%ld)\n", size, offset);
++    printf("Posix::PRead(size=%u, offset=%llu)\n", size, (unsigned long long)offset);
+     num_bytes_read = davix_client.pread(fd, buffer, size, offset, &err);
+   }
+   if (num_bytes_read < 0) {
+-- 
+2.29.2
+
diff --git a/xrootd.spec b/xrootd.spec
index 9b28a34..ddb91b3 100644
--- a/xrootd.spec
+++ b/xrootd.spec
@@ -28,6 +28,9 @@ Source0:	http://xrootd.org/download/v%{version}/%{name}-%{version}.tar.gz
 #		Library dependency should use target name
 #		https://github.com/xrootd/xrootd-ceph/pull/14
 Patch0:		%{name}-ceph-deps.patch
+#		Fix format error on 32 bit architectures
+#		https://github.com/xrootd/xrdcl-http/pull/7
+Patch1:		%{name}-32bit-format.patch
 
 BuildRequires:	gcc-c++
 BuildRequires:	cmake3 >= 3.1
@@ -280,6 +283,7 @@ This package contains the API documentation of the xrootd libraries.
 %prep
 %setup -q
 %patch0 -p1
+%patch1 -p1
 
 %build
 %cmake3 \
@@ -650,6 +654,7 @@ fi
   replacing the packages built from separate source rpms
 - Drop patches (accepted upstream or previously backported)
 - Fix broken library dependency in XrdCeph cmake file
+- Fix format error on 32 bit architectures
 
 * Sat Feb 13 2021 Mattias Ellert <mattias.ellert@physics.uu.se> - 1:5.0.3-5
 - Drop workaround for false positive warning from gcc 11