diff --git a/CHANGELOG.md b/CHANGELOG.md
index f93d61b9d..0737d66b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -35,6 +35,12 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 # Changelog
 
+## [Unreleased]
+
+### Improvements
+
+* (cli) [\#9717](https://github.com/cosmos/cosmos-sdk/pull/9717) Added CLI flag `--output json/text` to `tx` cli commands.
+
 ## [v0.43.0-rc2](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.43.0-rc2) - 2021-07-19
 
 ### Bug Fixes
diff --git a/client/flags/flags.go b/client/flags/flags.go
index 14e4c8155..1c0e1585c 100644
--- a/client/flags/flags.go
+++ b/client/flags/flags.go
@@ -93,6 +93,7 @@ func AddQueryFlagsToCmd(cmd *cobra.Command) {
 
 // AddTxFlagsToCmd adds common flags to a module tx command.
 func AddTxFlagsToCmd(cmd *cobra.Command) {
+	cmd.Flags().StringP(tmcli.OutputFlag, "o", "json", "Output format (text|json)")
 	cmd.Flags().String(FlagKeyringDir, "", "The client Keyring directory; if omitted, the default 'home' directory will be used")
 	cmd.Flags().String(FlagFrom, "", "Name or address of private key with which to sign")
 	cmd.Flags().Uint64P(FlagAccountNumber, "a", 0, "The account number of the signing account (offline mode only)")