diff --git a/src/makefile b/src/makefile
index 1363bc0..7e5f2e2 100644
--- a/src/makefile
+++ b/src/makefile
@@ -29,7 +29,7 @@ DEBUG?=NODEBUG
 # LUAINC_macosx: 
 # /opt/local/include
 LUAINC_macosx_base?=/opt/local/include
-LUAINC_macosx?=$(LUAINC_macosx_base)$(LUAV)
+LUAINC_macosx?=$(LUAINC_macosx_base)/lua$(LUAV)
 # FIXME default should this default to fink or to macports?
 # What happens when more than one Lua version is installed?
 LUAPREFIX_macosx?=/opt/local/
diff --git a/src/mime.c b/src/mime.c
index a1aaae9..06e5132 100644
--- a/src/mime.c
+++ b/src/mime.c
@@ -263,6 +263,8 @@ static int mime_global_b64(lua_State *L)
         lua_pushnil(L);
         return 2;
     }
+    /* make sure we don't confuse buffer stuff with arguments */
+    lua_settop(L, 2);
     /* process first part of the input */
     luaL_buffinit(L, &buffer);
     while (input < last) 
@@ -307,6 +309,8 @@ static int mime_global_unb64(lua_State *L)
         lua_pushnil(L);
         return 2;
     }
+    /* make sure we don't confuse buffer stuff with arguments */
+    lua_settop(L, 2);
     /* process first part of the input */
     luaL_buffinit(L, &buffer);
     while (input < last) 
@@ -458,6 +462,8 @@ static int mime_global_qp(lua_State *L)
         lua_pushnil(L);
         return 2;
     }
+    /* make sure we don't confuse buffer stuff with arguments */
+    lua_settop(L, 3);
     /* process first part of input */
     luaL_buffinit(L, &buffer);
     while (input < last)
@@ -531,6 +537,8 @@ static int mime_global_unqp(lua_State *L)
         lua_pushnil(L);
         return 2;
     }
+    /* make sure we don't confuse buffer stuff with arguments */
+    lua_settop(L, 2);
     /* process first part of input */
     luaL_buffinit(L, &buffer);
     while (input < last)