diff --git a/0001-build-resolve-i586-compile-error.patch b/0001-build-resolve-i586-compile-error.patch
new file mode 100644
index 0000000..e1b0019
--- /dev/null
+++ b/0001-build-resolve-i586-compile-error.patch
@@ -0,0 +1,36 @@
+From b13e1bf5522baa86021a6ff40e1e29e84e84538a Mon Sep 17 00:00:00 2001
+From: Jan Engelhardt <jengelh@inai.de>
+Date: Mon, 30 Oct 2023 08:01:14 +0100
+Subject: [PATCH] build: resolve i586 compile error
+
+edb2mt.cpp: In function 'read_col':
+edb2mt.cpp:211:65: error: cannot convert 'size_t*' {aka 'unsigned
+int*'} to 'size64_t*' {aka 'long long unsigned int*'}
+---
+ tools/edb2mt.cpp | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/tools/edb2mt.cpp b/tools/edb2mt.cpp
+index 159b2c4fc..8ed992b95 100644
+--- a/tools/edb2mt.cpp
++++ b/tools/edb2mt.cpp
+@@ -206,12 +206,14 @@ static void read_col(libesedb_record_t *row, unsigned int x,
+ 			throw az_error("EE-1014", err);
+ 	} else if (is_lval) {
+ 		ese_lval_ptr lv;
++		uint64_t dsize64 = 0;
+ 		if (libesedb_record_get_long_value(row, x, &unique_tie(lv), &~unique_tie(err)) < 1)
+ 			throw az_error("EE-1018", err);
+-		if (libesedb_long_value_get_data_size(lv.get(), &dsize, &~unique_tie(err)) < 1)
++		if (libesedb_long_value_get_data_size(lv.get(), &dsize64, &~unique_tie(err)) < 1)
+ 			throw az_error("EE-1019", err);
+-		if (dsize == 0)
++		if (dsize64 == 0)
+ 			return;
++		dsize = std::max(dsize64, static_cast<uint64_t>(UINT32_MAX));
+ 		udata.resize(dsize);
+ 		if (libesedb_long_value_get_data(lv.get(),
+ 		    TOU8(udata.data()), dsize, &~unique_tie(err)) < 1)
+-- 
+2.42.0
+
diff --git a/gromox.changes b/gromox.changes
index ea209d8..38dcf73 100644
--- a/gromox.changes
+++ b/gromox.changes
@@ -13,6 +13,7 @@ Sun Oct 29 18:44:37 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
   * oxvcard: export to .vcf now positions the VERSION property in
     accordance with the vCard 4.0 specification.
   * oxcmail: cease gratuitous RTF conversion of calendar items.
+- Add 0001-build-resolve-i586-compile-error.patch
 
 -------------------------------------------------------------------
 Wed Oct 18 13:01:38 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
diff --git a/gromox.spec b/gromox.spec
index a06873a..7014c21 100644
--- a/gromox.spec
+++ b/gromox.spec
@@ -28,6 +28,7 @@ URL:            https://grommunio.com/
 Source:         https://github.com/grommunio/gromox/releases/download/%name-%version/%name-%version.tar.zst
 Source2:        https://github.com/grommunio/gromox/releases/download/%name-%version/%name-%version.tar.asc
 Source8:        %name.keyring
+Patch1:         0001-build-resolve-i586-compile-error.patch
 BuildRequires:  automake >= 1.11
 BuildRequires:  fdupes
 BuildRequires:  gcc-c++