diff --git a/Makefile b/Makefile
index 4e3bb48..f0315d7 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ X_INSTALL_DIR := /usr/X11R6
 LINKOPTS := -L$(X_INSTALL_DIR)/lib -lfltk -lXext -lX11 -lm
 FLUID := fluid
 
-CXXFLAGS+= -I /usr/include/cairo
+CXXFLAGS+= -I /usr/include/cairo -std=c++23
 #CXXFLAGS+= -g -O0
 CXXFLAGS+= -Oz