diff --git a/pkgs/overlay.nix b/pkgs/overlay.nix
index 34e56fb..e354fd8 100644
--- a/pkgs/overlay.nix
+++ b/pkgs/overlay.nix
@@ -30,5 +30,12 @@ final: prev:
     ];
   });
 
+  slurm = prev.slurm.overrideAttrs (old: {
+    patches = (old.patches or []) ++ [
+      # See https://bugs.schedmd.com/show_bug.cgi?id=19324
+      ./slurm-rank-expansion.patch
+    ];
+  });
+
   prometheus-slurm-exporter = prev.callPackage ./slurm-exporter.nix { };
 }
diff --git a/pkgs/slurm-rank-expansion.patch b/pkgs/slurm-rank-expansion.patch
new file mode 100644
index 0000000..4666d76
--- /dev/null
+++ b/pkgs/slurm-rank-expansion.patch
@@ -0,0 +1,11 @@
+--- a/src/plugins/mpi/pmix/pmixp_dmdx.c	2024-03-15 13:05:24.815313882 +0100
++++ b/src/plugins/mpi/pmix/pmixp_dmdx.c	2024-03-15 13:09:53.936900823 +0100
+@@ -314,7 +314,7 @@ static void _dmdx_req(buf_t *buf, int no
+ 	}
+ 
+ 	nsptr = pmixp_nspaces_local();
+-	if (nsptr->ntasks <= rank) {
++	if ((long) nsptr->ntasks <= (long) rank) {
+ 		char *nodename = pmixp_info_job_host(nodeid);
+ 		PMIXP_ERROR("Bad request from %s: nspace \"%s\" has only %d ranks, asked for %d",
+ 			    nodename, ns, nsptr->ntasks, rank);