diff --git a/srcpkgs/mdadm/patches/time64.patch b/srcpkgs/mdadm/patches/time64.patch
new file mode 100644
index 00000000000..c02ca8f7592
--- /dev/null
+++ b/srcpkgs/mdadm/patches/time64.patch
@@ -0,0 +1,20 @@
+--- monitor.c	2018-10-01 18:26:06.000000000 +0000
++++ monitor.c	2020-01-22 19:51:39.575877908 +0000
+@@ -20,6 +20,7 @@
+ 
+ #include "mdadm.h"
+ #include "mdmon.h"
++#include <inttypes.h>
+ #include <sys/syscall.h>
+ #include <sys/select.h>
+ #include <signal.h>
+@@ -447,7 +448,7 @@
+ 	}
+ 
+ 	gettimeofday(&tv, NULL);
+-	dprintf("(%d): %ld.%06ld state:%s prev:%s action:%s prev: %s start:%llu\n",
++	dprintf("(%d): %"PRId64".%06"PRId64" state:%s prev:%s action:%s prev: %s start:%llu\n",
+ 		a->info.container_member,
+ 		tv.tv_sec, tv.tv_usec,
+ 		array_states[a->curr_state],
+