main.go | 3 +++
 run.go  | 4 +++-

diff --git a/main.go b/main.go
index 9bd7766cd3820cf6e65360bd2ae3d4dd6ddabfcbe657d41b357d8aa50ccebfb6..9c10a756afab17ce0257251ea035ba07dd881753193023455d1624d03161bad4 100644
--- a/main.go
+++ b/main.go
@@ -223,6 +223,9 @@ 		InodeTrust = InodeTrustMtime
 	default:
 		log.Fatalln("unknown", EnvInodeTrust, "value")
 	}
+	if os.Getenv(EnvShell) != "" {
+		Shell = os.Getenv(EnvShell)
+	}
 
 	// Those are internal envs
 	FdOODTgts, err = os.CreateTemp("", "ood-tgts")
diff --git a/run.go b/run.go
index 3f19556907a36c2fb4191934a60491edc95b2e77c016d4fbc7caf6c90b9a992f..8ab764c0a8c3d369a74d2632213bf09922bcd655fecf375a2b606a12de2b7669 100644
--- a/run.go
+++ b/run.go
@@ -54,6 +54,7 @@ 	EnvStderrKeep   = "REDO_LOGS"
 	EnvStderrSilent = "REDO_SILENT"
 	EnvNoSync       = "REDO_NO_SYNC"
 	EnvStopIfMod    = "REDO_STOP_IF_MODIFIED"
+	EnvShell        = "REDO_SHELL"
 
 	RedoDir      = ".redo"
 	LockSuffix   = ".lock"
@@ -72,6 +73,7 @@ 	StopIfMod    = false
 	Jobs         sync.WaitGroup
 	TmpsToClean  = make(map[string]struct{})
 	TmpsToCleanM sync.Mutex
+	Shell        = "/bin/sh"
 
 	flagTrace          *bool
 	flagTraceAll       *bool
@@ -391,7 +393,7 @@ 	if err = unix.Access(doFile.a, unix.X_OK); err == nil {
 		cmdName = doFile.a
 		args = make([]string, 0, 3)
 	} else {
-		cmdName = "/bin/sh"
+		cmdName = Shell
 		if traced || TracedAll {
 			args = append(args, "-ex")
 		} else {