diff --git a/Makefile b/Makefile
index 545b195..0de21bc 100644
--- a/Makefile
+++ b/Makefile
@@ -9,8 +9,11 @@ CC= gcc
 CFLAGS= $(INCS) $(WARN) -O2 $G
 WARN= -std=c11 -pedantic -Wall -Wextra
 INCS= -I$(LUA_INC)
-#MAKESO= $(CC) -shared
-MAKESO= $(CC) -bundle -undefined dynamic_lookup
+ifeq ($(shell uname -s),Darwin)
+	MAKESO= $(CC) -bundle -undefined dynamic_lookup
+else
+	MAKESO= $(CC) -shared
+endif
 
 MYNAME= immutable
 MYLIB= l$(MYNAME)
diff --git a/limmutable.c b/limmutable.c
index 1837ac8..c0827d7 100644
--- a/limmutable.c
+++ b/limmutable.c
@@ -116,6 +116,7 @@ static inline int _create_instance(lua_State *L, int from_table)
                     item_hash = (1000003 * type) ^ (lua_Integer)lua_topointer(L, -1);
                     break;
                 }
+                // fallthrough
             case LUA_TTABLE:
             case LUA_TFUNCTION:
             case LUA_TUSERDATA: