diff --git a/Makefile b/Makefile
index fdaee5a6f..d7584aa04 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.123 2026/09/08 08:33:10 nicm Exp $
+# $OpenBSD: Makefile,v 1.124 2026/09/20 09:21:47 sthen Exp $
 
 PROG=	tmux
 SRCS=	alerts.c \
@@ -154,6 +154,8 @@ CFLAGS += -I${.CURDIR}
 LDADD=	-lutil -lcurses -levent -lm
 DPADD=	${LIBUTIL} ${LIBCURSES} ${LIBEVENT} ${LIBM}
 
+DEBUG=	-g
+
 .if "${MACHINE_ARCH}" == "sh"
 screen-redraw.o:
 	${CC} ${CFLAGS} -fno-stack-protector ${CPPFLAGS} -c ${.IMPSRC}