diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index e22e72b..05b0e4a 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -8,35 +8,23 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.4.0beta10
+SHLIB_MINOR=	1.4.0beta11
 
 LIB=	png
 SRCS=	png.c pngerror.c pnggccrd.c pngget.c pngmem.c pngpread.c \
 	pngread.c pngrio.c pngrtran.c pngrutil.c pngset.c pngtrans.c \
 	pngwio.c pngwrite.c pngwtran.c pngwutil.c
 
-HDRS=	png.h pngconf.h
+HDRS=	png.h pngconf.h pngpriv.h pngdefs.h
 
 CFLAGS+= -Wall
 CPPFLAGS+= -I${.CURDIR}
 
-all: pngconf.h
+all: pngconf.h pngdefs.h
 
-pngconf.h.in: pngconf.h
-	cat pngconf.h > pngconf.h.in
-
-pngconf.h: pngconf.h.in
-	sed "/Makefile-supplied defines go here:/q" pngconf.h.in > pngconf.h
-
-	/* if you want to use the intel assembler code, remove this */
-	echo "#define PNG_NO_MMX_CODE" >> pngconf.h
-	/* if you want to use the intel MMX code, also remove this */
-	echo "#define PNG_NO_ASSEMBLER_CODE" >> pngconf.h
-
-	/* if you don't need thread safety you can uncomment this */
-	# echo "#define PNG_THREAD_UNSAFE_OK" >> pngconf.h
-
-	sed "1,/Makefile-supplied defines go here:/d" pngconf.h.in >> pngconf.h
+pngdefs.h:
+	echo "/* pngdefs.h was built by makefile.openbsd */" > pngdefs.h
+	echo "#define PNG_NO_ASSEMBLER_CODE" >> pngdefs.h
 
 NOPROFILE= Yes
 
@@ -80,6 +68,7 @@
 	@rm -f ${DESTDIR}${LIBDIR}/debug/libpng.a
 	@rm -f ${DESTDIR}${PREFIX}/include/png.h
 	@rm -f ${DESTDIR}${PREFIX}/include/pngconf.h
+	@rm -f ${DESTDIR}${PREFIX}/include/pngdefs.h
 	@rmdir ${DESTDIR}${LIBDIR}/debug 2>/dev/null || true
 	${INSTALL} ${INSTALL_COPY} -o ${SHAREOWN} -g ${SHAREGRP} \
 		-m ${NONBINMODE} ${HDRS} ${DESTDIR}${PREFIX}/include/libpng