diff --git a/esp8266/webinterface.cpp b/esp8266/webinterface.cpp
index 1ee80f13..88758a6b 100644
--- a/esp8266/webinterface.cpp
+++ b/esp8266/webinterface.cpp
@@ -332,7 +332,8 @@ const char POLLING_ID[]PROGMEM ="POLLING";
 char * progmem2char(const char* src)
 {
   static char buffer[300];
-  strcpy_P(buffer,src);
+  buffer[0]=0;
+  if(strlen_P(src)<299)strcpy_P(buffer,src);
   return buffer;
 }