diff --git a/code/components/jomjol_flowcontroll/ClassFlowMQTT.cpp b/code/components/jomjol_flowcontroll/ClassFlowMQTT.cpp
index e0df96fc..6d470c33 100644
--- a/code/components/jomjol_flowcontroll/ClassFlowMQTT.cpp
+++ b/code/components/jomjol_flowcontroll/ClassFlowMQTT.cpp
@@ -110,7 +110,7 @@ bool ClassFlowMQTT::ReadParameter(FILE* pfile, string& aktparamgraph)
         std::string _param = GetParameterName(splitted[0]);
         if ((toUpper(_param) == "CACERT") && (splitted.size() > 1))
         {
-            this->caCertFilename = splitted[1];
+            this->caCertFilename = "/sdcard" + splitted[1];
         }
         if ((toUpper(_param) == "VALIDATESERVERCERT") && (splitted.size() > 1))
         {
@@ -118,11 +118,11 @@ bool ClassFlowMQTT::ReadParameter(FILE* pfile, string& aktparamgraph)
         }  
         if ((toUpper(_param) == "CLIENTCERT") && (splitted.size() > 1))
         {
-            this->clientCertFilename = splitted[1];
+            this->clientCertFilename = "/sdcard" + splitted[1];
         }  
         if ((toUpper(_param) == "CLIENTKEY") && (splitted.size() > 1))
         {
-            this->clientKeyFilename = splitted[1];
+            this->clientKeyFilename = "/sdcard" + splitted[1];
         }  
         if ((toUpper(_param) == "USER") && (splitted.size() > 1))
         {
@@ -370,4 +370,4 @@ void ClassFlowMQTT::handleIdx(string _decsep, string _value)
     }
 }
 
-#endif //ENABLE_MQTT
\ No newline at end of file
+#endif //ENABLE_MQTT