diff --git a/lfs/strongswan b/lfs/strongswan
index 421541369..ace2c5814 100644
--- a/lfs/strongswan
+++ b/lfs/strongswan
@@ -75,6 +75,7 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
 	cd $(DIR_APP) && patch -Np1 -i $(DIR_SRC)/src/patches/strongswan-ipfire-interfaces.patch
 	cd $(DIR_APP) && patch -Np1 -i $(DIR_SRC)/src/patches/strongswan-ipfire-revert.patch
 
+	$(UPDATE_AUTOMAKE)
 	cd $(DIR_APP) && ./configure \
 		--prefix="/usr" \
 		--sysconfdir="/etc" \