diff --git a/backend/s3/config.go b/backend/s3/config.go
index b65c77488..eed4cabe7 100644
--- a/backend/s3/config.go
+++ b/backend/s3/config.go
@@ -63,7 +63,7 @@ func ParseConfig(s string) (interface{}, error) {
 	}
 	cfg.Bucket = path[0]
 	if len(path) > 1 {
-		cfg.Prefix = path[1]
+		cfg.Prefix = strings.TrimRight(path[1], "/")
 	} else {
 		cfg.Prefix = defaultPrefix
 	}
diff --git a/backend/s3/config_test.go b/backend/s3/config_test.go
index 29f0509b4..63bc2c77e 100644
--- a/backend/s3/config_test.go
+++ b/backend/s3/config_test.go
@@ -21,6 +21,11 @@ var configTests = []struct {
 		Bucket:   "bucketname",
 		Prefix:   "prefix/directory",
 	}},
+	{"s3://eu-central-1/bucketname/prefix/directory/", Config{
+		Endpoint: "eu-central-1",
+		Bucket:   "bucketname",
+		Prefix:   "prefix/directory",
+	}},
 	{"s3:eu-central-1/foobar", Config{
 		Endpoint: "eu-central-1",
 		Bucket:   "foobar",
@@ -36,6 +41,11 @@ var configTests = []struct {
 		Bucket:   "foobar",
 		Prefix:   "prefix/directory",
 	}},
+	{"s3:eu-central-1/foobar/prefix/directory/", Config{
+		Endpoint: "eu-central-1",
+		Bucket:   "foobar",
+		Prefix:   "prefix/directory",
+	}},
 	{"s3:https://hostname:9999/foobar", Config{
 		Endpoint: "hostname:9999",
 		Bucket:   "foobar",
@@ -52,12 +62,24 @@ var configTests = []struct {
 		Prefix:   "restic",
 		UseHTTP:  true,
 	}},
+	{"s3:http://hostname:9999/foobar/", Config{
+		Endpoint: "hostname:9999",
+		Bucket:   "foobar",
+		Prefix:   "",
+		UseHTTP:  true,
+	}},
 	{"s3:http://hostname:9999/bucket/prefix/directory", Config{
 		Endpoint: "hostname:9999",
 		Bucket:   "bucket",
 		Prefix:   "prefix/directory",
 		UseHTTP:  true,
 	}},
+	{"s3:http://hostname:9999/bucket/prefix/directory/", Config{
+		Endpoint: "hostname:9999",
+		Bucket:   "bucket",
+		Prefix:   "prefix/directory",
+		UseHTTP:  true,
+	}},
 }
 
 func TestParseConfig(t *testing.T) {