diff --git a/src/TLSClient.cpp b/src/TLSClient.cpp
index dfcc5639e..63e276e16 100644
--- a/src/TLSClient.cpp
+++ b/src/TLSClient.cpp
@@ -257,7 +257,7 @@ void TLSClient::connect (const std::string& host, const std::string& port)
   {
     if (_debug)
       std::cout << "c: ERROR Certificate verification failed.\n";
-    throw std::string (STRING_TLS_INIT_FAIL);
+    throw format (STRING_TLS_INIT_FAIL, gnutls_strerror (ret));
   }
 #endif
 
diff --git a/src/l10n/eng-USA.h b/src/l10n/eng-USA.h
index 890440b3a..0e5bf7527 100644
--- a/src/l10n/eng-USA.h
+++ b/src/l10n/eng-USA.h
@@ -743,7 +743,7 @@
 #define STRING_UDA_COLLISION         "The UDA named '{1}' is the same as a core attribute, and is not permitted."
 #define STRING_INVALID_MOD           "The '{1}' attribute does not allow a value of '{2}'."
 #define STRING_INVALID_SORT_COL      "The '{1}' column is not a valid sort field."
-#define STRING_TLS_INIT_FAIL         "Error initializing TLS."
+#define STRING_TLS_INIT_FAIL         "Error initializing TLS. {1}"
 #define STRING_ERROR_MEMORY          "Problem obtaining memory."
 #define STRING_ERROR_DETAILS         "The setting 'calendar.details.report' must contain a single report name."
 
diff --git a/src/l10n/epo-RUS.h b/src/l10n/epo-RUS.h
index 6316dee46..16cc07614 100644
--- a/src/l10n/epo-RUS.h
+++ b/src/l10n/epo-RUS.h
@@ -743,7 +743,7 @@
 #define STRING_UDA_COLLISION         "UDA '{1}' kaj enkonstruita atributo havas la saman nomon.  Tio estas malpermesita."
 #define STRING_INVALID_MOD           "Atributo '{1}' ne permesas valoron '{2}'."
 #define STRING_INVALID_SORT_COL      "Kolumno '{1}' ne estas valida kampo por ordigi."
-#define STRING_TLS_INIT_FAIL         "Erara eko de TLS."
+#define STRING_TLS_INIT_FAIL         "Erara eko de TLS. {1}"
 #define STRING_ERROR_MEMORY          "Ne povis akiri memoron."
 #define STRING_ERROR_DETAILS         "Agordo 'calendar.details.report' devas enhavi sole unu raportnomon."
 
diff --git a/src/l10n/esp-ESP.h b/src/l10n/esp-ESP.h
index 641dfb63c..5912bb9e5 100644
--- a/src/l10n/esp-ESP.h
+++ b/src/l10n/esp-ESP.h
@@ -750,7 +750,7 @@
 #define STRING_UDA_COLLISION         "El UDA denominado '{1}' es el mismo que un atributo del núcleo, y no está permitido."
 #define STRING_INVALID_MOD           "El atributo '{1}' no admite un valor '{2}'."
 #define STRING_INVALID_SORT_COL      "La columna '{1}' no es un campo de ordenación válido."
-#define STRING_TLS_INIT_FAIL         "Error inicializando TLS."
+#define STRING_TLS_INIT_FAIL         "Error inicializando TLS. {1}"
 #define STRING_ERROR_MEMORY          "Problema obteniendo memoria."
 #define STRING_ERROR_DETAILS         "La variable de configuración 'calendar.details.report' debe contener un único nombre de informe."
 
diff --git a/src/l10n/fra-FRA.h b/src/l10n/fra-FRA.h
index e76679e43..76d84edc9 100644
--- a/src/l10n/fra-FRA.h
+++ b/src/l10n/fra-FRA.h
@@ -742,7 +742,7 @@
 #define STRING_UDA_COLLISION         "L'ADU nommé '{1}' est le même qu'un attribut du noyau, et ce n'est pas autorisé."
 #define STRING_INVALID_MOD           "The '{1}' attribute does not allow a value of '{2}'."
 #define STRING_INVALID_SORT_COL      "The '{1}' column is not a valid sort field."
-#define STRING_TLS_INIT_FAIL         "Erreur en initialisant TLS."
+#define STRING_TLS_INIT_FAIL         "Erreur en initialisant TLS. {1}"
 #define STRING_ERROR_MEMORY          "Problem obtaining memory."
 #define STRING_ERROR_DETAILS         "The setting 'calendar.details.report' must contain a single report name."
 
diff --git a/src/l10n/ita-ITA.h b/src/l10n/ita-ITA.h
index 6746b4879..baa687dc9 100644
--- a/src/l10n/ita-ITA.h
+++ b/src/l10n/ita-ITA.h
@@ -743,7 +743,7 @@
 #define STRING_UDA_COLLISION         "L'UDA '{1}' ha lo stesso nome di un attributo di sistema, e ciò non è permesso."
 #define STRING_INVALID_MOD           "L'attributo '{1}' non ammette un valore pari a '{2}'."
 #define STRING_INVALID_SORT_COL      "La colonna '{1}' non è un campo di ordinamento valido."
-#define STRING_TLS_INIT_FAIL         "Error initializing TLS."
+#define STRING_TLS_INIT_FAIL         "Error initializing TLS. {1}"
 #define STRING_ERROR_MEMORY          "Problem obtaining memory."
 #define STRING_ERROR_DETAILS         "The setting 'calendar.details.report' must contain a single report name."
 
diff --git a/src/l10n/por-PRT.h b/src/l10n/por-PRT.h
index 198d1b590..53601a5a0 100644
--- a/src/l10n/por-PRT.h
+++ b/src/l10n/por-PRT.h
@@ -743,7 +743,7 @@
 #define STRING_UDA_COLLISION         "O UDA '{1}' tem o mesmo nome que um atributo interno, tal não é permitido."
 #define STRING_INVALID_MOD           "O atributo '{1}' não permite o valor '{2}'."
 #define STRING_INVALID_SORT_COL      "A coluna '{1}' não pode ser ordenada."
-#define STRING_TLS_INIT_FAIL         "Erro a iniciar componente TLS."
+#define STRING_TLS_INIT_FAIL         "Erro a iniciar componente TLS. {1}"
 #define STRING_ERROR_MEMORY          "Problema a alocar memória."
 #define STRING_ERROR_DETAILS         "A definição 'calendar.details.report' pode apenas indicar um nome de relatório."