diff --git a/base/flex/flex.conf b/base/flex/flex.conf
index d72c7b247..cf39c5703 100644
--- a/base/flex/flex.conf
+++ b/base/flex/flex.conf
@@ -24,4 +24,3 @@ hook_add postmake 5 "pkg_flex_postmake"
 hook_add preconf 5 "sed -i -e '/test-bison-yylloc/d' -e '/test-bison-yylval/d' tests/Makefile.in"
 # don't mix with host system
 var_append GCC_WRAPPER_REMOVE ' ' "-I/usr/include"
-
diff --git a/base/flex/flex.desc b/base/flex/flex.desc
index eaf649f06..be35afb5c 100644
--- a/base/flex/flex.desc
+++ b/base/flex/flex.desc
@@ -33,4 +33,6 @@
 [V] 2.6.3
 [P] X 01-3-5---9 102.080
 
+[O] autogen=1
+
 [D] 1929379314 flex-2.6.3.tar.gz !https://github.com/westes/flex/releases/download/v2.6.3/flex-2.6.3.tar.gz