diff --git a/src/test/run-pass/foreign-call-no-runtime.rs b/src/test/run-pass/foreign-call-no-runtime.rs
index 2d3ff62a00537..f4792c212165d 100644
--- a/src/test/run-pass/foreign-call-no-runtime.rs
+++ b/src/test/run-pass/foreign-call-no-runtime.rs
@@ -25,15 +25,39 @@ extern {
 pub fn main() {
     unsafe {
         thread::spawn(move|| {
-            let i = 100;
-            rust_dbg_call(callback, mem::transmute(&i));
-        }).join();
+            let i: isize = 100;
+            rust_dbg_call(callback_isize, mem::transmute(&i));
+        }).join().unwrap();
+
+        thread::spawn(move|| {
+            let i: i32 = 100;
+            rust_dbg_call(callback_i32, mem::transmute(&i));
+        }).join().unwrap();
+
+        thread::spawn(move|| {
+            let i: i64 = 100;
+            rust_dbg_call(callback_i64, mem::transmute(&i));
+        }).join().unwrap();
     }
 }
 
-extern fn callback(data: libc::uintptr_t) {
+extern fn callback_isize(data: libc::uintptr_t) {
     unsafe {
         let data: *const isize = mem::transmute(data);
         assert_eq!(*data, 100);
     }
 }
+
+extern fn callback_i64(data: libc::uintptr_t) {
+    unsafe {
+        let data: *const i64 = mem::transmute(data);
+        assert_eq!(*data, 100);
+    }
+}
+
+extern fn callback_i32(data: libc::uintptr_t) {
+    unsafe {
+        let data: *const i32 = mem::transmute(data);
+        assert_eq!(*data, 100);
+    }
+}