diff --git a/0001-Disambiguate-num-Integer-div_ceil-from-number-div_ce.patch b/0001-Disambiguate-num-Integer-div_ceil-from-number-div_ce.patch
new file mode 100644
index 0000000..d606f8e
--- /dev/null
+++ b/0001-Disambiguate-num-Integer-div_ceil-from-number-div_ce.patch
@@ -0,0 +1,56 @@
+From d7ea03257825c173fcd4b8eed26fb177f638bfb3 Mon Sep 17 00:00:00 2001
+From: Fabio Valentini <decathorpe@gmail.com>
+Date: Mon, 9 Oct 2023 01:33:38 +0200
+Subject: [PATCH] Disambiguate num::Integer::div_ceil from <number>::div_ceil
+
+---
+ src/bench.rs     | 2 +-
+ src/hasher.rs    | 4 ++--
+ src/testfiles.rs | 2 +-
+ 3 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/src/bench.rs b/src/bench.rs
+index 85603a8..5092a41 100644
+--- a/src/bench.rs
++++ b/src/bench.rs
+@@ -649,7 +649,7 @@ impl Bench {
+     fn time_hash(size: usize, params: &Params, tf: &TestFiles) -> f64 {
+         let mut hasher = hasher::Hasher::new(1.0, 0.0);
+         let chunk_size = params.chunk_pages * *PAGE_SIZE;
+-        let chunks_per_unit = (tf.unit_size as usize).div_ceil(&chunk_size);
++        let chunks_per_unit = Integer::div_ceil(&(tf.unit_size as usize), &chunk_size);
+ 
+         let started_at = Instant::now();
+ 
+diff --git a/src/hasher.rs b/src/hasher.rs
+index 6ee2084..7e5d3e5 100644
+--- a/src/hasher.rs
++++ b/src/hasher.rs
+@@ -580,9 +580,9 @@ impl DispatchThread {
+             // determined by each hash worker to avoid overloading the
+             // dispatch thread.
+             let file_size = self.file_size_normal.sample(&mut rng).round() as usize;
+-            let file_nr_chunks = file_size.div_ceil(&chunk_size).max(1);
++            let file_nr_chunks = Integer::div_ceil(&file_size, &chunk_size).max(1);
+             let anon_size = self.anon_size_normal.sample(&mut rng).round() as usize;
+-            let anon_nr_chunks = anon_size.div_ceil(&chunk_size);
++            let anon_nr_chunks = Integer::div_ceil(&anon_size, &chunk_size);
+ 
+             let hasher_thread = HasherThread {
+                 tf: self.tf.clone(),
+diff --git a/src/testfiles.rs b/src/testfiles.rs
+index 28e046a..b7dc555 100644
+--- a/src/testfiles.rs
++++ b/src/testfiles.rs
+@@ -34,7 +34,7 @@ impl TestFiles {
+             base_path: PathBuf::from(base_path.as_ref()),
+             unit_size,
+             size,
+-            nr_files: size.div_ceil(&unit_size),
++            nr_files: Integer::div_ceil(&size, &unit_size),
+             comp,
+             prefix: String::from(DFL_PREFIX),
+         }
+-- 
+2.41.0
+
diff --git a/rust-rd-hashd.spec b/rust-rd-hashd.spec
index c3a256a..f39d73b 100644
--- a/rust-rd-hashd.spec
+++ b/rust-rd-hashd.spec
@@ -13,6 +13,8 @@ URL:            https://crates.io/crates/rd-hashd
 Source:         %{crates_source}
 # hashd: build fix for 32bit archs
 Patch0:         https://github.com/facebookexperimental/resctl-demo/commit/dbe5735bdf005a24e54dd19559016a59f6f43536.patch
+# * fix builds with Rust 1.73+ caused by ambiguous <number>::div_ceil calls
+Patch1:         0001-Disambiguate-num-Integer-div_ceil-from-number-div_ce.patch
 
 BuildRequires:  rust-packaging >= 23
 
@@ -42,7 +44,9 @@ License:        Apache-2.0 AND BSD-3-Clause AND MIT AND Unicode-DFS-2016 AND (Ap
 %{_bindir}/rd-hashd
 
 %prep
-%autosetup -n %{crate}-%{version_no_tilde} -p2
+%autosetup -n %{crate}-%{version_no_tilde} -N
+%patch -P0 -p2
+%patch -P1 -p1
 %cargo_prep
 
 %generate_buildrequires