diff --git a/src/types.c b/src/types.c
index 0ec2dec..57bbb1a 100644
--- a/src/types.c
+++ b/src/types.c
@@ -26,8 +26,12 @@ Type *primitive_parse(const char *src) {
 	
 	if(!strcmp(src, "ugpr")) {
 		return type_u(8 * arch_gpr_size());
+	} else if(!strcmp(src, "sgpr")) {
+		return type_s(8 * arch_gpr_size());
 	} else if(!strcmp(src, "umem")) {
 		return type_u(arch_memory_width());
+	} else if(!strcmp(src, "smem")) {
+		return type_s(arch_memory_width());
 	}
 	
 	TypePrimitive *ret = calloc(1, sizeof(*ret));