diff --git a/postproc/Makefile b/postproc/Makefile
index 9dc3eb604bd3a41d0f5e8aec84122d8d7761a6d2..b030c72854e100d778f954437110e8c6826ed579 100644
--- a/postproc/Makefile
+++ b/postproc/Makefile
@@ -20,6 +20,7 @@ all:    $(SWSLIB)
 
 $(SWSLIB):     $(SWSOBJS)
 	$(AR) r $(SWSLIB) $(SWSOBJS)
+	$(RANLIB) $(SWSLIB)
 
 clean:
 	rm -f *.o *.a *~ *.so cs_test swscale-example