diff --git a/src/main/res/values-en-rGB/strings.xml b/src/main/res/values-en-rGB/strings.xml
index 2ca296c..9bfbb89 100644
--- a/src/main/res/values-en-rGB/strings.xml
+++ b/src/main/res/values-en-rGB/strings.xml
@@ -183,4 +183,5 @@
     <string name="no_confirm">No</string>
     <string name="pref_show_sync_notifications">Show sync notifications</string>
     <string name="sync_complete">Synchronisation complete</string>
-    </resources>
+    <string name="err_sync_http_write_failed">Error #19: Failed to write HTTP stream when pushing data to server.</string>
+</resources>
diff --git a/src/main/res/values-es/strings.xml b/src/main/res/values-es/strings.xml
index ae56cc0..559d76b 100644
--- a/src/main/res/values-es/strings.xml
+++ b/src/main/res/values-es/strings.xml
@@ -183,4 +183,5 @@
     <string name="no_confirm">No</string>
     <string name="pref_show_sync_notifications">Mostrar notificaciones de la sincronización</string>
     <string name="sync_complete">Sincronización completada</string>
-    </resources>
+    <string name="err_sync_http_write_failed">Error #19: Falló la escritura de transmisión HTTP al enviar datos al servidor.</string>
+</resources>