diff --git a/CHANGELOG.org b/CHANGELOG.org
index 3bea072..0cd38fe 100644
--- a/CHANGELOG.org
+++ b/CHANGELOG.org
@@ -21,6 +21,7 @@ Added refresh to bootstrap.sh to build seed from cc_x86.s
 Added missing license headers
 Added support for ~expressions
 Added prototype for Slow_Lisp build test
+Added Custom type for mes.h
 
 ** Changed
 Converted M2-Planet to use GNU style error message
diff --git a/cc_types.c b/cc_types.c
index a133771..b99ed3d 100644
--- a/cc_types.c
+++ b/cc_types.c
@@ -86,7 +86,14 @@ void initialize_types()
 	/* unsigned* has the same properties as unsigned */
 	g->indirect = g;
 
+	/* Custom type for mescc*/
+	struct type* h = calloc(1, sizeof(struct type));
+	h->name = "SCM";
+	h->size = 4;
+	h->indirect = h;
+
 	/* Finalize type list */
+	g->next = h;
 	f->next = g;
 	e->next = f;
 	d->next = e;
diff --git a/test/test.answers b/test/test.answers
index bbf2dbb..12126f0 100644
--- a/test/test.answers
+++ b/test/test.answers
@@ -9,7 +9,7 @@ a9a3e332d13ded5f80d7431f8717f26527b3722b33ea57760a9a5723dffc099c  test/results/t
 f1c01feb865c4d552033186d9ce50dd39468a7e8aebf762886c13ad3e03b5011  test/results/test08-binary
 3b39e72f3de90ed690adfaf6145af46157cef2ec5e72867ac577fa27a0229894  test/results/test09-binary
 020e86020819cc4963e6185b22e534fcf8306b6cb116f12643f254a24688ff0a  test/results/test10-binary
-0c5850abb4ea2c4ba62005d6783b7b076baf86e2b960a806e10ee25dfc30b620  test/results/test100-binary
+db6523217dd153dfbbf660750be5ea82ebdf7086a62e3456721e25d4479eedd4  test/results/test100-binary
 3fd11bad4a426ce1ff8fd9c6d7d2b943effae9f3f5740b7376e426e9b0555851  test/results/test11-binary
 f98ab8e4bb35580e0dde96126d7a56aff66bda208d02c8d89390b40d6cff591c  test/results/test12-binary
 5051ffca2615144419f8ec1a5d4999486ae81e7781428f59e47e866af97cef92  test/results/test13-binary
diff --git a/test/test100/proof.answer b/test/test100/proof.answer
index ed47876..240fb91 100644
--- a/test/test100/proof.answer
+++ b/test/test100/proof.answer
@@ -1 +1 @@
-b39435961127c9f5096e07a54c1aff13b02444d0ca07c61477558c1b1ff999a1  test/test100/proof
+621f03ddcfe25625517ccdf36002cb290047869764be270c45fdb2ab4493b3fc  test/test100/proof