diff --git a/simulator/Makefile b/simulator/Makefile
index c68f385a04..30e15b1f1b 100644
--- a/simulator/Makefile
+++ b/simulator/Makefile
@@ -39,17 +39,15 @@ endif
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-# this config if debugging is needed, but the binary is about 50M
-#  USE_OPT = -Wall     -ggdb    -Werror-implicit-function-declaration -Werror -Wno-error=pointer-sign -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=sign-compare -Wno-error=unused-parameter -Wno-error=missing-field-initializers -Wno-error=write-strings -Wno-error=strict-aliasing
-#  USE_OPT = -Wall -O0 -ggdb -g -Wno-error=implicit-fallthrough -Werror-implicit-function-declaration -Wno-error=pointer-sign -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=sign-compare -Wno-error=unused-parameter -Wno-error=missing-field-initializers -Wno-error=write-strings
-# this config producec a smaller binary file
-# 7.3 compiler would want -Wno-error=implicit-fallthrough while 6.4 does not know about it
-# see https://github.com/rusefi/rusefi/issues/517
-  USE_OPT = -Wall -O2 -g -Wno-error=implicit-fallthrough -Wno-error=write-strings -Wno-error=strict-aliasing
+	USE_OPT = -Wall -Wno-error=implicit-fallthrough -Wno-error=write-strings -Wno-error=strict-aliasing
+
+#	If you would like to debug the simulator, swap which of these lines is commented. It's commented because debug info causes a 10-15x increase in binary size.
+	USE_OPT += -O2
+#	USE_OPT += -O0 -g
 
 	ifeq ($(OS),Windows_NT)
 	else
- 	 USE_OPT +=  -m32
+		USE_OPT += -m32
 	endif
 endif