diff --git a/subversion-1.12.2-fsfspacktest.patch b/subversion-1.12.2-fsfspacktest.patch
new file mode 100644
index 0000000..ba5e0fa
--- /dev/null
+++ b/subversion-1.12.2-fsfspacktest.patch
@@ -0,0 +1,26 @@
+
+get_rev_contents() has signed integer overflow with "long int" rev
+and behaves unpredictably.
+
+--- subversion-1.12.2/subversion/tests/libsvn_fs_fs/fs-fs-pack-test.c.fsfspacktest
++++ subversion-1.12.2/subversion/tests/libsvn_fs_fs/fs-fs-pack-test.c
+@@ -59,7 +59,8 @@
+ get_rev_contents(svn_revnum_t rev, apr_pool_t *pool)
+ {
+   /* Toss in a bunch of magic numbers for spice. */
+-  apr_int64_t num = ((rev * 1234353 + 4358) * 4583 + ((rev % 4) << 1)) / 42;
++  apr_int64_t rev64 = rev;
++  apr_int64_t num = ((rev64 * 1234353 + 4358) * 4583 + ((rev64 % 4) << 1)) / 42;
+   return apr_psprintf(pool, "%" APR_INT64_T_FMT "\n", num);
+ }
+ 
+@@ -407,7 +408,8 @@
+ 
+       if (! svn_stringbuf_compare(rstring, sb))
+         return svn_error_createf(SVN_ERR_FS_GENERAL, NULL,
+-                                 "Bad data in revision %ld.", i);
++                                 "Bad data in revision %ld - [%s] not [%s].",
++                                 i, rstring->data, sb->data);
+     }
+ 
+   return SVN_NO_ERROR;
diff --git a/subversion.spec b/subversion.spec
index 69fbbd7..0e4ca95 100644
--- a/subversion.spec
+++ b/subversion.spec
@@ -45,7 +45,7 @@
 Summary: A Modern Concurrent Version Control System
 Name: subversion
 Version: 1.13.0
-Release: 3%{?dist}
+Release: 4%{?dist}
 License: ASL 2.0
 URL: https://subversion.apache.org/
 
@@ -61,6 +61,7 @@ Patch1: subversion-1.12.0-linking.patch
 Patch2: subversion-1.12.2-py3tests.patch
 Patch4: subversion-1.8.0-rubybind.patch
 Patch5: subversion-1.8.5-swigplWall.patch
+Patch7: subversion-1.12.2-fsfspacktest.patch
 BuildRequires: autoconf, libtool, texinfo, which
 BuildRequires: swig >= 1.3.24, gettext
 %if %{with bdb}
@@ -219,6 +220,7 @@ This package includes supplementary tools for use with Subversion.
 %endif
 %patch4 -p1 -b .rubybind
 %patch5 -p1 -b .swigplWall
+%patch7 -p1 -b .fsfspacktest
 
 %build
 # Regenerate the buildsystem, so that:
@@ -540,6 +542,9 @@ make check-javahl
 %endif
 
 %changelog
+* Wed Feb 12 2020 Joe Orton <jorton@redhat.com> - 1.13.0-4
+- fix FTBFS on 32-bit arches
+
 * Mon Jan  6 2020 Joe Orton <jorton@redhat.com> - 1.13.0-3
 - F-32: fix include path for ruby 2.7 (Mamoru TASAKA)