diff --git a/changelog.d/819.feature b/changelog.d/819.feature
new file mode 100644
index 0000000000..181469d5a0
--- /dev/null
+++ b/changelog.d/819.feature
@@ -0,0 +1 @@
+Permettre les captures d'écran en mode développement #819
diff --git a/vector/src/main/java/im/vector/app/core/platform/VectorBaseActivity.kt b/vector/src/main/java/im/vector/app/core/platform/VectorBaseActivity.kt
index dbf469e346..304474c00c 100644
--- a/vector/src/main/java/im/vector/app/core/platform/VectorBaseActivity.kt
+++ b/vector/src/main/java/im/vector/app/core/platform/VectorBaseActivity.kt
@@ -233,7 +233,9 @@ abstract class VectorBaseActivity<VB : ViewBinding> : AppCompatActivity(), Maver
         }
 
         // Set flag FLAG_SECURE
-        if (vectorPreferences.useFlagSecure()) {
+        // Tchap : handle differently screenshot authorization not relying on Preferences flag SETTINGS_SECURITY_USE_FLAG_SECURE
+        // if (vectorPreferences.useFlagSecure()) {
+        if (!vectorPreferences.tchapAllowedScreenshot()) {
             window.addFlags(WindowManager.LayoutParams.FLAG_SECURE)
         }
 
diff --git a/vector/src/main/java/im/vector/app/features/settings/VectorPreferences.kt b/vector/src/main/java/im/vector/app/features/settings/VectorPreferences.kt
index 47152dc577..4f89097f91 100755
--- a/vector/src/main/java/im/vector/app/features/settings/VectorPreferences.kt
+++ b/vector/src/main/java/im/vector/app/features/settings/VectorPreferences.kt
@@ -23,6 +23,7 @@ import android.provider.MediaStore
 import androidx.annotation.BoolRes
 import androidx.core.content.edit
 import com.squareup.seismic.ShakeDetector
+import im.vector.app.BuildConfig
 import im.vector.app.R
 import im.vector.app.config.Config
 import im.vector.app.core.di.DefaultPreferences
@@ -996,6 +997,26 @@ class VectorPreferences @Inject constructor(
         return defaultPrefs.getBoolean(SETTINGS_SECURITY_USE_FLAG_SECURE, true)
     }
 
+    // Tchap
+    /**
+     * Screenshot is not allowed for Tchap F-droid version.
+     * It is allowed for Tchap GPlay version only for DEV and Pre-Prod versions.
+     * It is not allowed for Tchap GPlay Tchap (Production) version.
+     */
+    fun tchapAllowedScreenshot(): Boolean {
+        return when (BuildConfig.FLAVOR_store.lowercase()) {
+            "fdroid" -> false
+            "gplay" -> {
+                when(BuildConfig.FLAVOR_target.lowercase()) {
+                    "devtchap" -> true
+                    "btchap" -> true
+                    else -> false
+                }
+            }
+            else -> false
+        }
+    }
+
     /** Whether the keyboard should disable personalized learning. */
     fun useIncognitoKeyboard(): Boolean {
         return defaultPrefs.getBoolean(SETTINGS_SECURITY_INCOGNITO_KEYBOARD_PREFERENCE_KEY, false)