diff --git a/targets/RT/USER/lte-ru.c b/targets/RT/USER/lte-ru.c
index 10516a73c7..91621ed68f 100644
--- a/targets/RT/USER/lte-ru.c
+++ b/targets/RT/USER/lte-ru.c
@@ -1748,6 +1748,7 @@ static void* ru_thread( void* param ) {
   int ret;
   cpu_set_t cpuset;
   CPU_ZERO(&cpuset);
+  char strname[100];
 
   // set default return value