diff --git a/install.sh b/install.sh
index 710c1f0..c90eba5 100644
--- a/install.sh
+++ b/install.sh
@@ -8,7 +8,7 @@ fi
 
 # associative array for the platforms that will be verified in build_main_platforms()
 # this will be eval'd in the functions below because arrays can't be exported
-export MAIN_PLATFORMS='declare -A main_platforms=( [uno]="arduino:avr:uno" [due]="arduino:sam:arduino_due_x" [zero]="arduino:samd:arduino_zero_native" [esp8266]="esp8266:esp8266:huzzah:FlashSize=4M3M,CpuFrequency=80" [leonardo]="arduino:avr:leonardo" [m4]="adafruit:samd:adafruit_metro_m4" )'
+export MAIN_PLATFORMS='declare -A main_platforms=( [uno]="arduino:avr:uno" [due]="arduino:sam:arduino_due_x" [zero]="arduino:samd:arduino_zero_native" [esp8266]="esp8266:esp8266:huzzah:FlashSize=4M3M,CpuFrequency=80" [leonardo]="arduino:avr:leonardo" [m4]="adafruit:samd:adafruit_metro_m4" [mega2560]="arduino:avr:mega:cpu=atmega2560" )'
 
 # associative array for other platforms that can be called explicitly in .travis.yml configs
 # this will be eval'd in the functions below because arrays can't be exported