diff --git a/src/header/dirent/mod.rs b/src/header/dirent/mod.rs
index 8dd3346f80..4de934d6df 100644
--- a/src/header/dirent/mod.rs
+++ b/src/header/dirent/mod.rs
@@ -371,4 +371,4 @@ pub extern "C" fn telldir(dir: &mut DIR) -> c_long {
 }
 
 #[unsafe(no_mangle)]
-pub unsafe extern "C" fn cbindgen_stupid_struct_user_for_posix_dent(a: posix_dent) {}
+pub unsafe extern "C" fn cbindgen_stupid_struct_user_for_posix_dent(_: posix_dent) {}
diff --git a/src/header/dlfcn/mod.rs b/src/header/dlfcn/mod.rs
index f575e1f771..2402351ecc 100644
--- a/src/header/dlfcn/mod.rs
+++ b/src/header/dlfcn/mod.rs
@@ -192,3 +192,6 @@ pub unsafe extern "C" fn dlclose(handle: *mut c_void) -> c_int {
 pub extern "C" fn dlerror() -> *mut c_char {
     ERROR.swap(0, Ordering::SeqCst) as *mut c_char
 }
+
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn cbindgen_stupid_alias_dlinfo_for_dladdr(_: Dl_info) {}
diff --git a/src/header/fcntl/mod.rs b/src/header/fcntl/mod.rs
index 52fa719d0b..dd3dd21ab6 100644
--- a/src/header/fcntl/mod.rs
+++ b/src/header/fcntl/mod.rs
@@ -93,7 +93,7 @@ pub unsafe extern "C" fn open(path: *const c_char, oflag: c_int, mut __valist: .
 }
 
 #[unsafe(no_mangle)]
-pub unsafe extern "C" fn cbindgen_stupid_struct_user_for_fcntl(a: flock) {}
+pub unsafe extern "C" fn cbindgen_stupid_struct_user_for_fcntl(_: flock) {}
 
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn posix_fallocate(fd: c_int, offset: off_t, length: off_t) -> c_int {
diff --git a/src/header/signal/mod.rs b/src/header/signal/mod.rs
index 4dcde99ea1..07764df47a 100644
--- a/src/header/signal/mod.rs
+++ b/src/header/signal/mod.rs
@@ -541,4 +541,4 @@ pub unsafe extern "C" fn psiginfo(info: *const siginfo_t, prefix: *const c_char)
 }
 
 #[unsafe(no_mangle)]
-pub unsafe extern "C" fn cbindgen_stupid_struct_sigevent_for_timer(a: sigevent) {}
+pub unsafe extern "C" fn cbindgen_stupid_struct_sigevent_for_timer(_: sigevent) {}