diff -Naur atasm109-old/src/Makefile atasm109-new/src/Makefile
--- atasm109-old/src/Makefile	2021-09-08 09:53:25.581598063 -0300
+++ atasm109-new/src/Makefile	2021-09-08 09:55:20.366131338 -0300
@@ -16,8 +16,8 @@
 UNIX    = -DUNIX
 
 # Compiler flags, if you are using egcs, pgcs, or gcc >2.8.1 use:
-#CFLAGS  = -g -Wall $(USEZ) $(DOS) $(UNIX) $(ARCH)
-CFLAGS  = -Wall $(USEZ) $(DOS) $(UNIX) -O3 -fomit-frame-pointer $(ARCH)
+CFLAGS  = -g -Wall $(USEZ) $(DOS) $(UNIX) $(ARCH)
+#CFLAGS  = -Wall $(USEZ) $(DOS) $(UNIX) -O3 -fomit-frame-pointer $(ARCH)
 
 L       =  $(ZLIB)
 CC      = gcc