diff --git a/configure.in b/configure.in
index ee8f53c0..5f99ba8d 100644
--- a/configure.in
+++ b/configure.in
@@ -141,7 +141,6 @@ AC_OUTPUT([
 Makefile
 src/Makefile
 src/cpu/Makefile
-src/cpu/core_16/Makefile
 src/cpu/core_full/Makefile
 src/cpu/core_normal/Makefile
 src/debug/Makefile