diff --git a/Riot/Modules/Settings/Security/SecurityViewController.m b/Riot/Modules/Settings/Security/SecurityViewController.m
index e464c3eb1..2d6122cfd 100644
--- a/Riot/Modules/Settings/Security/SecurityViewController.m
+++ b/Riot/Modules/Settings/Security/SecurityViewController.m
@@ -853,6 +853,7 @@ - (void)setupCrossSigning:(id)sender
     [self setupCrossSigningWithTitle:TchapL10n.securityCrossSigningSetupTitle // Tchap
                              message:[VectorL10n securitySettingsUserPasswordDescription]
                              success:^{
+                                [self loadCrossSigning]; // Tchap: reload cross-signing state after activation
                              } failure:^(NSError *error) {
                              }];
 }
@@ -1079,7 +1080,8 @@ - (void)setupSecureBackup
         [self setupCrossSigningWithTitle:[VectorL10n secureKeyBackupSetupIntroTitle]
                                  message:[VectorL10n securitySettingsUserPasswordDescription]
                                  success:^{
-                                     [self setupSecureBackup2];
+                                    [self loadCrossSigning]; // Tchap: reload cross-signing state after activation
+                                    [self setupSecureBackup2];
                                  } failure:^(NSError *error) {
                                  }];
     }
diff --git a/changelog.d/840.change b/changelog.d/840.change
new file mode 100644
index 000000000..2349cc11d
--- /dev/null
+++ b/changelog.d/840.change
@@ -0,0 +1 @@
+Actualiser l'état de la signature croisée dans l'interface des réglages de sécurité après son activation
\ No newline at end of file