diff --git a/src/Makefile b/src/Makefile
index 9b49b44..dbba29f 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -8,7 +8,7 @@
 ########## Variables ##########
 
 CXX = g++					# compiler
-CXXFLAGS = -std=c++20 -g -Wall -MMD -lncurses			# compiler flags
+CXXFLAGS = -std=c++20 -g -Wall -MMD -lncurses -O0			# compiler flags
 MAKEFILE_NAME = ${firstword ${MAKEFILE_LIST}}	# makefile name
 
 SOURCES = $(wildcard *.cc)			# source files (*.cc)