diff --git a/configure.in b/configure.in
index 92d3a54923..65672da4d5 100644
--- a/configure.in
+++ b/configure.in
@@ -1236,6 +1236,7 @@ gen/Makefile.embed.isql:${MAKE_SRC_DIR}/Makefile.in.embed.isql
 gen/Makefile.embed.gdef:${MAKE_SRC_DIR}/Makefile.in.embed.gdef
 gen/Makefile.embed.qli:${MAKE_SRC_DIR}/Makefile.in.embed.qli
 gen/Makefile.embed.gpre:${MAKE_SRC_DIR}/Makefile.in.embed.gpre
+gen/Makefile.extern.regex:${MAKE_SRC_DIR}/Makefile.in.extern.regex
 gen/Makefile.install:builds/install/arch-specific/${INSTALL_PREFIX}/Makefile.in
 Makefile:Makefile.in
 )