diff --git a/dictionary.rs b/dictionary.rs
index a0b98af..bbe8fa8 100644
--- a/dictionary.rs
+++ b/dictionary.rs
@@ -127,7 +127,7 @@ impl<KeyRefType: Clone + AbstractCFTypeRef, ValueRefType: Clone + AbstractCFType
         unsafe {
             CFDictionaryContainsKey(self.contents.obj, 
                                     cast::transmute::<CFTypeRef, *c_void>(key.as_type_ref()))
-                                        as bool
+                                        != 0
         }
     }
 
@@ -138,7 +138,7 @@ impl<KeyRefType: Clone + AbstractCFTypeRef, ValueRefType: Clone + AbstractCFType
             let did_find_value = CFDictionaryGetValueIfPresent(
                 self.contents.obj,
                 cast::transmute::<CFTypeRef, *c_void>(key.as_type_ref()),
-                cast::transmute::<&*c_void, **c_void>(&value)) as bool;
+                cast::transmute::<&*c_void, **c_void>(&value)) != 0;
 
             // FIXME: this will not handle non-CF dictionary entries
             // or ptr::null() values correctly.
diff --git a/number.rs b/number.rs
index 1d2ad67..f07dba3 100644
--- a/number.rs
+++ b/number.rs
@@ -150,7 +150,7 @@ impl CFNumber {
     #[fixed_stack_segment]
     fn has_float_type(&self) -> bool {
         unsafe {
-            CFNumberIsFloatType(self.contents.obj) as bool
+            CFNumberIsFloatType(self.contents.obj) != 0
         }
     }