Followup to #12249

2018-10-30 22:49:49 -05:00
parent b780b69c62
commit b5d7f69b51
2 changed files with 4 additions and 3 deletions
--- a/Marlin/src/sd/cardreader.h
+++ b/Marlin/src/sd/cardreader.h
@ -157,7 +157,7 @@ public:
    #if NUM_SERIAL > 1
      uint8_t transfer_port;
    #else
-      constexpr uint8_t transfer_port = 0;
+      static constexpr uint8_t transfer_port = 0;
    #endif
  #endif