diff -urN duke3d.orig/source/Makefile duke3d/source/Makefile
--- duke3d.orig/source/Makefile	2003-06-23 12:59:13.000000000 +0200
+++ duke3d/source/Makefile	2003-09-09 20:29:02.000000000 +0200
@@ -87,8 +87,7 @@
 endif
 
 CC = gcc
-CFLAGS = -c -g $(SDL_CFLAGS) -DUSE_SDL=1 -DPLATFORM_UNIX=1 -W -Wall -Wno-unused $(EXTRACFLAGS) -funsigned-char
-OPTIMIZE = -O2
+CFLAGS = -c $(SDL_CFLAGS) -DUSE_SDL=1 -DPLATFORM_UNIX=1 -W -Wall -Wno-unused $(EXTRACFLAGS) -funsigned-char
 
 # Uncomment this to compile with the Intel compiler (v6.0)
 #CC = icc
@@ -103,7 +102,7 @@
 
 
 %.o : %.c
-	$(CC) $(CFLAGS) $(OPTIMIZE) -o $@ $<
+	$(CC) $(CFLAGS) -o $@ $<
 
 # Animation playback crashes due to optimization error on MacOS X. --ryan.
 ifeq ($(strip $(macosx)),true)