diff --git a/config.mk b/config.mk
index 7667c95..42211dc 100644
--- a/config.mk
+++ b/config.mk
@@ -26,10 +26,10 @@ INCS = -I${X11INC} -I${FREETYPEINC}
 LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS}
 
 # flags
-CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700L -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS} -Wall -Ofast -march=native -fno-semantic-interposition -flto ${INCS}
+CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700L -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS} -Wall -Ofast -march=native -fno-semantic-interposition -flto=auto ${INCS}
 #CFLAGS   = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS}
 CFLAGS   = -std=c99 -pedantic -Wno-deprecated-declarations ${CPPFLAGS}
-LDFLAGS  = -flto -s ${LIBS}
+LDFLAGS  = -flto=auto -s ${LIBS}
 
 # Solaris
 #CFLAGS = -fast ${INCS} -DVERSION=\"${VERSION}\"