diff --git a/Makefiles/Makefile.OSX b/Makefiles/Makefile.OSX
index 30a90e1..faae55e 100644
--- a/Makefiles/Makefile.OSX
+++ b/Makefiles/Makefile.OSX
@@ -66,7 +66,7 @@ endif
 #	OSX-specific
 #
 
-PLATFORM_CXXFLAGS = $(SDL_CFLAGS) -DSUPERMODEL_OSX -F/Library/Frameworks/
+PLATFORM_CXXFLAGS = $(SDL_CFLAGS) -DSUPERMODEL_OSX -F/Library/Frameworks/ -O3
 PLATFORM_LDFLAGS = $(SDL_LIBS) -lz -lm -lstdc++ -F/Library/Frameworks/
 
 
diff --git a/Makefiles/Makefile.UNIX b/Makefiles/Makefile.UNIX
index dd7872a..5df12f5 100644
--- a/Makefiles/Makefile.UNIX
+++ b/Makefiles/Makefile.UNIX
@@ -63,7 +63,7 @@ SDL2_LIBS = `sdl2-config --libs`
 #	UNIX-specific
 #
 
-PLATFORM_CXXFLAGS = $(SDL2_CFLAGS) -Ofast
+PLATFORM_CXXFLAGS = $(SDL2_CFLAGS) -O3
 PLATFORM_LDFLAGS = $(SDL2_LIBS) -lGL -lGLU -lz -lm -lstdc++ -lpthread -lSDL2_net
 
 
diff --git a/Makefiles/Options.inc b/Makefiles/Options.inc
index b673941..f5761af 100644
--- a/Makefiles/Options.inc
+++ b/Makefiles/Options.inc
@@ -54,7 +54,7 @@ endif
 #
 # Enable support for Model3 Net Board emulation
 #
-NET_BOARD = 1
+NET_BOARD =
 ifneq ($(filter $(strip $(NET_BOARD)),0 1),$(strip $(NET_BOARD)))
 	override NET_BOARD =
 endif