diff --git a/viper.go b/viper.go
index 1125aad..907cfe5 100644
--- a/viper.go
+++ b/viper.go
@@ -903,7 +903,7 @@ func (v *Viper) find(lcaseKey string) interface{} {
 			return cast.ToUint(flag.ValueString())
 		case "bool":
 			return cast.ToBool(flag.ValueString())
-		case "stringSlice", "stringArray", "boolSlice", "ipSlice", "uintSlice", "intSlice":
+		case "stringSlice", "stringArray", "boolSlice", "ipSlice", "uintSlice", "intSlice", "durationSlice":
 			s := strings.TrimPrefix(flag.ValueString(), "[")
 			s = strings.TrimSuffix(s, "]")
 			res, _ := readAsCSV(s)
@@ -974,7 +974,7 @@ func (v *Viper) find(lcaseKey string) interface{} {
 			return cast.ToUint(flag.ValueString())
 		case "bool":
 			return cast.ToBool(flag.ValueString())
-		case "stringSlice", "stringArray", "boolSlice", "ipSlice", "uintSlice", "intSlice":
+		case "stringSlice", "stringArray", "boolSlice", "ipSlice", "uintSlice", "intSlice", "durationSlice":
 			s := strings.TrimPrefix(flag.ValueString(), "[")
 			s = strings.TrimSuffix(s, "]")
 			res, _ := readAsCSV(s)