--- src/sdl/Makefile.in.orig	2024-04-19 10:02:18.000000000 +1000
+++ src/sdl/Makefile.in	2024-10-15 14:28:17.000000000 +1100
@@ -284,7 +284,7 @@
 top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
-AM_CFLAGS = @CFLAGS@ @SDL_CFLAGS@ -I$(srcdir)/..
+AM_CFLAGS = -I$(srcdir)/.. @CFLAGS@ @SDL_CFLAGS@
 noinst_LIBRARIES = libsdlsopwith.a libsdlsopmain.a
 libsdlsopwith_a_SOURCES = video.c pcsound.c timer.c
 libsdlsopmain_a_SOURCES = main.c