diff --git a/src/servo/dom/rcu.rs b/src/servo/dom/rcu.rs
index b1d3f69e89a..867b9f58a88 100644
--- a/src/servo/dom/rcu.rs
+++ b/src/servo/dom/rcu.rs
@@ -57,6 +57,7 @@ themselves.
 ")];
 
 import ptr::extensions;
+import core::libc::types::os::arch::c95::size_t;
 
 export handle;
 export reader_methods;
@@ -133,7 +134,7 @@ impl private_methods<T: copy send,A> for scope<T,A> {
     fn clone(v: *T) -> *T unsafe {
         let n: *mut T =
             unsafe::reinterpret_cast(
-                libc::calloc(sys::size_of::<T>(), 1u));
+                libc::calloc(sys::size_of::<T>() as size_t, 1u as size_t));
 
         // n.b.: this assignment will run the drop glue for <T,A>.
         // *Hopefully* the fact that everything is initialized to NULL
@@ -215,7 +216,7 @@ impl writer_methods<T:copy send,A> for scope<T,A> {
     fn handle(v: T) -> handle<T,A> unsafe {
         let d: *handle_data<T,A> =
             unsafe::reinterpret_cast(
-                libc::malloc(sys::size_of::<handle_data<T,A>>()));
+                libc::malloc(sys::size_of::<handle_data<T,A>>() as size_t));
         (*d).rd_ptr = self.clone(ptr::addr_of(v));
         (*d).wr_ptr = (*d).rd_ptr;
         (*d).rd_aux = ptr::null();
diff --git a/src/servo/gfx/renderer.rs b/src/servo/gfx/renderer.rs
index e715bab0f59..758b92ac572 100644
--- a/src/servo/gfx/renderer.rs
+++ b/src/servo/gfx/renderer.rs
@@ -315,6 +315,7 @@ fn draw_some_text(draw_target: AzDrawTargetRef) {
     import cairoftbg = azure::cairo_ft::bindgen;
     import libc::types::common::c99::uint16_t;
     import libc::types::common::c99::uint32_t;
+    import azure::freetype::FT_Long;
 
     impl methods for ft::FT_Error {
         fn for_sure() { assert self == 0 as ft::FT_Error }
@@ -328,7 +329,7 @@ fn draw_some_text(draw_target: AzDrawTargetRef) {
     let face: ft::FT_Face = ptr::null();
     vec::as_buf(fontbin) {|buf|
         ftbg::FT_New_Memory_Face(library, buf, fontbin.len() as ft::FT_Long,
-                                 0, ptr::addr_of(face)).for_sure();
+                                 0 as FT_Long, ptr::addr_of(face)).for_sure();
     }
 
     unsafe {