diff --git a/Makefile.in b/Makefile.in
index b86f934..48e2f75 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -9,6 +9,7 @@ CC		= @CC@
 PROG		= pkgconf@EXEEXT@
 SRCS		= main.c pkg.c bsdstubs.c getopt_long.c fragment.c argvsplit.c fileio.c tuple.c dependency.c
 OBJS		= ${SRCS:.c=.o}
+CFLAGS		= @CFLAGS@
 CFLAGS		+= -DLIBDIR=\"${libdir}\" -DINCLUDEDIR=\"${includedir}\" -DPKG_DEFAULT_PATH=\"${libdir}/pkgconfig:${datadir}/pkgconfig\" -Wall -Wextra -Wformat=2 -std=gnu99 -D_FORTIFY_SOURCE=2
 
 all: build