diff --git a/radio/src/opentx.h b/radio/src/opentx.h
index 4e13a2fbe..ff436c52f 100644
--- a/radio/src/opentx.h
+++ b/radio/src/opentx.h
@@ -1513,7 +1513,7 @@ union ReusableBuffer
         uint16_t eepromfree;
 #if defined(SDCARD)
         char menu_bss[MENU_MAX_LINES][MENU_LINE_LENGTH];
-        char mainname[sizeof(menu_bss)]; // because reused for SD backup / restore
+        char mainname[45]; // because reused for SD backup / restore, max backup filename 44 chars: "/MODELS/MODEL0134353-2014-06-19-04-51-27.bin"
 #else
         char mainname[LEN_MODEL_NAME];
 #endif
diff --git a/radio/src/simpgmspace.cpp b/radio/src/simpgmspace.cpp
index b8ef7beff..c72a1c6c7 100644
--- a/radio/src/simpgmspace.cpp
+++ b/radio/src/simpgmspace.cpp
@@ -40,7 +40,7 @@
 #include <stdarg.h>
 #include <sys/stat.h>
 #if defined(RTCLOCK)
-	#include <time.h>
+  #include <time.h>
 #endif
 
 #if defined WIN32 || !defined __GNUC__