diff --git a/src/partition/repart.c b/src/partition/repart.c
index 6cadc5f668..2cc4881ada 100644
--- a/src/partition/repart.c
+++ b/src/partition/repart.c
@@ -7344,6 +7344,9 @@ static int run(int argc, char *argv[]) {
                 return r;
 
         r = find_root(context);
+        if (r == -ENODEV)
+                return 76; /* Special return value which means "Root block device not found, so not doing
+                            * anything". This isn't really an error when called at boot. */
         if (r < 0)
                 return r;
 
diff --git a/units/systemd-repart.service.in b/units/systemd-repart.service.in
index b1322a159b..2b57b93ca8 100644
--- a/units/systemd-repart.service.in
+++ b/units/systemd-repart.service.in
@@ -31,5 +31,7 @@ Type=oneshot
 RemainAfterExit=yes
 ExecStart={{BINDIR}}/systemd-repart --dry-run=no
 
+# The tool returns 76 if it can't find the root block device
+SuccessExitStatus=76
 # The tool returns 77 if there's no existing GPT partition table
 SuccessExitStatus=77