diff --git a/0001-Make-sure-offset_table_offset-is-written-as-8-bytes.patch b/0001-Make-sure-offset_table_offset-is-written-as-8-bytes.patch
new file mode 100644
index 0000000..564f65b
--- /dev/null
+++ b/0001-Make-sure-offset_table_offset-is-written-as-8-bytes.patch
@@ -0,0 +1,43 @@
+From 2b984085425549496b365255e807d1b45ac57e69 Mon Sep 17 00:00:00 2001
+From: Josh Stone <cuviper@gmail.com>
+Date: Thu, 16 Jan 2020 12:52:53 -0800
+Subject: [PATCH 1/2] Make sure offset_table_offset is written as 8 bytes
+
+It's a `usize` value, but the output format expects 8 bytes. That's fine
+on 64-bit targets, but 32-bit targets were failing tests:
+
+    ---- stream::binary_writer::tests::bplist_roundtrip stdout ----
+    thread 'stream::binary_writer::tests::bplist_roundtrip' panicked at 'assertion failed: `(left == right)`
+      left: `8`,
+     right: `4`: destination and source slices have different lengths', src/libcore/slice/mod.rs:2217:9
+    note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
+    ---- stream::binary_writer::tests::nskeyedarchiver_roundtrip stdout ----
+    thread 'stream::binary_writer::tests::nskeyedarchiver_roundtrip' panicked at 'assertion failed: `(left == right)`
+      left: `8`,
+     right: `4`: destination and source slices have different lengths', src/libcore/slice/mod.rs:2217:9
+    ---- stream::binary_writer::tests::utf16_roundtrip stdout ----
+    thread 'stream::binary_writer::tests::utf16_roundtrip' panicked at 'assertion failed: `(left == right)`
+      left: `8`,
+     right: `4`: destination and source slices have different lengths', src/libcore/slice/mod.rs:2217:9
+
+Casting to `u64` makes sure we have the correct size to write.
+---
+ src/stream/binary_writer.rs | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/stream/binary_writer.rs b/src/stream/binary_writer.rs
+index 6541ea8d09d5..fe1e0902cda8 100644
+--- a/src/stream/binary_writer.rs
++++ b/src/stream/binary_writer.rs
+@@ -335,7 +335,7 @@ impl<W: Write> BinaryWriter<W> {
+         trailer[6] = offset_size;
+         trailer[7] = ref_size;
+         trailer[8..16].copy_from_slice(&(self.num_objects as u64).to_be_bytes());
+-        trailer[24..32].copy_from_slice(&offset_table_offset.to_be_bytes());
++        trailer[24..32].copy_from_slice(&(offset_table_offset as u64).to_be_bytes());
+         self.writer.write_exact(&trailer)?;
+ 
+         self.writer
+-- 
+2.24.1
+
diff --git a/rust-plist.spec b/rust-plist.spec
index 9fc4b3c..5d66f27 100644
--- a/rust-plist.spec
+++ b/rust-plist.spec
@@ -14,6 +14,9 @@ License:        MIT
 URL:            https://crates.io/crates/plist
 Source:         %{crates_source}
 
+# Fix for 32-bit targets, https://github.com/ebarnard/rust-plist/pull/47
+Patch1:         0001-Make-sure-offset_table_offset-is-written-as-8-bytes.patch
+
 ExclusiveArch:  %{rust_arches}
 %if %{__cargo_skip_build}
 BuildArch:      noarch