diff --git a/cocoa-foundation/src/foundation.rs b/cocoa-foundation/src/foundation.rs
index 2924aca9d..d64edac2b 100644
--- a/cocoa-foundation/src/foundation.rs
+++ b/cocoa-foundation/src/foundation.rs
@@ -612,7 +612,7 @@ pub trait NSString: Sized {
     unsafe fn init_str(self, string: &str) -> Self;
     unsafe fn UTF8String(self) -> *const libc::c_char;
     unsafe fn len(self) -> usize;
-    unsafe fn isEqualToString(self, &str) -> bool;
+    unsafe fn isEqualToString(self, _: &str) -> bool;
     unsafe fn substringWithRange(self, range: NSRange) -> id;
 }
 
diff --git a/core-graphics-types/src/base.rs b/core-graphics-types/src/base.rs
index d5efc3b62..0add1e6b3 100644
--- a/core-graphics-types/src/base.rs
+++ b/core-graphics-types/src/base.rs
@@ -26,7 +26,7 @@ pub type CGFloat = libc::c_double;
 #[cfg(not(target_pointer_width = "64"))]
 pub type CGFloat = libc::c_float;
 
-pub type CGError = libc::int32_t;
+pub type CGError = i32;
 
 pub type CGGlyph = libc::c_ushort;
 
diff --git a/core-graphics/src/event.rs b/core-graphics/src/event.rs
index 8cf9c6262..bc01b8ad2 100644
--- a/core-graphics/src/event.rs
+++ b/core-graphics/src/event.rs
@@ -505,7 +505,7 @@ impl<'tap_life> CGEventTap<'tap_life> {
                     callback_ref: Box::from_raw(cbr),
                 })
             } else {
-                Box::from_raw(cbr);
+                let _ = Box::from_raw(cbr);
                 Err(())
             }
         }