diff --git a/virtual/platform.txt b/virtual/platform.txt
index 0a62699..a75e20c 100644
--- a/virtual/platform.txt
+++ b/virtual/platform.txt
@@ -16,13 +16,13 @@ compiler.warning_flags.all=-Wall -Wextra
 
 compiler.path=
 compiler.c.cmd=gcc
-compiler.c.flags=-c -g -Os {compiler.warning_flags} -std=gnu11 -ffunction-sections -fdata-sections -MMD
-compiler.c.elf.flags={compiler.warning_flags} -Os -Wl,--gc-sections
+compiler.c.flags=-c -g {compiler.warning_flags} -std=gnu11 -ffunction-sections -fdata-sections -MMD
+compiler.c.elf.flags={compiler.warning_flags} -Wl,--gc-sections
 compiler.c.elf.flags_join_archives=rcT
 compiler.c.elf.cmd=g++
 compiler.S.flags=-c -g -x assembler-with-cpp
 compiler.cpp.cmd=g++
-compiler.cpp.flags=-c -g -Os {compiler.warning_flags} -std=gnu++11 -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -DARDUINO_VIRTUAL=1 -DKALEIDOSCOPE_HARDWARE_H="Kaleidoscope-Hardware-Virtual.h"
+compiler.cpp.flags=-c -g {compiler.warning_flags} -std=gnu++11 -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD  -DARDUINO_VIRTUAL=1 -DKALEIDOSCOPE_HARDWARE_H="Kaleidoscope-Hardware-Virtual.h" -DUSBCON=dummy -DARDUINO_ARCH_AVR=1
 compiler.ar.cmd=ar
 compiler.ar.flags=rcs
 compiler.objcopy.cmd=objcopy