diff --git a/main/Makefile b/main/Makefile
index c40e5e2542..2aa8ef8a71 100644
--- a/main/Makefile
+++ b/main/Makefile
@@ -90,7 +90,7 @@ ifeq ($(OSARCH),SunOS)
 endif
 
 editline/libedit.a:
-	cd editline && test -f config.h || CFLAGS="$(OPTIMIZE)" ./configure --build=$(BUILD_PLATFORM) --host=$(HOST_PLATFORM)
+	cd editline && test -f config.h || CFLAGS="$(ASTCFLAGS)" ./configure --build=$(BUILD_PLATFORM) --host=$(HOST_PLATFORM)
 	$(MAKE) -C editline libedit.a
 
 db1-ast/libdb1.a: