--- a/coreCustom.cpp
+++ b/coreCustom.cpp
@@ -247,6 +247,8 @@
       "mul __zero_reg__, __zero_reg__ \n" // 2 cycles
       "mul __zero_reg__, __zero_reg__ \n" // 2 cycles
       );
+    // avr-gcc 7.3 compiles this loop faster than the original toolchain did: wait for the SPI transfer to finish
+    while (!(SPSR & _BV(SPIF))) { }
   }
 }
 
--- a/Text.cpp
+++ b/Text.cpp
@@ -136,7 +136,7 @@
 
 bool Text::DisplayTextOverTime( char const* text, int x, int y )
 {
-  Text::DisplayTextOverTime( (char *) text, x, y );
+  return Text::DisplayTextOverTime( (char *) text, x, y );
 }
 
 bool Text::DisplayTextOverTimeClear( char* text, int x, int y )