diff --git a/src/header/elf/mod.rs b/src/header/elf/mod.rs
index 363a9e02c5..6fff4c5f9c 100644
--- a/src/header/elf/mod.rs
+++ b/src/header/elf/mod.rs
@@ -77,7 +77,7 @@ pub const EI_MAG2: usize = 2;
 pub const ELFMAG2: c_char = 'L' as c_char;
 pub const EI_MAG3: usize = 3;
 pub const ELFMAG3: c_char = 'F' as c_char;
-pub const ELFMAG: &'static str = "\x7fELF";
+pub const ELFMAG: &str = "\x7fELF";
 pub const SELFMAG: usize = 4;
 pub const EI_CLASS: usize = 4;
 pub const ELFCLASSNONE: usize = 0;
@@ -774,8 +774,8 @@ pub struct Elf64_Nhdr {
     pub n_type: Elf64_Word,
 }
 
-pub const ELF_NOTE_SOLARIS: &'static str = "SUNW Solaris";
-pub const ELF_NOTE_GNU: &'static str = "GNU";
+pub const ELF_NOTE_SOLARIS: &str = "SUNW Solaris";
+pub const ELF_NOTE_GNU: &str = "GNU";
 
 pub const ELF_NOTE_PAGESIZE_HINT: usize = 1;
 
diff --git a/src/header/glob/mod.rs b/src/header/glob/mod.rs
index 72e5010d5f..1b5d297ee0 100644
--- a/src/header/glob/mod.rs
+++ b/src/header/glob/mod.rs
@@ -80,7 +80,7 @@ pub unsafe extern "C" fn glob(
     }
 
     let base_path = unsafe {
-        CStr::from_bytes_with_nul_unchecked(if glob_expr.to_bytes().get(0) == Some(&b'/') {
+        CStr::from_bytes_with_nul_unchecked(if glob_expr.to_bytes().first() == Some(&b'/') {
             b"/\0"
         } else {
             b"\0"
@@ -125,7 +125,7 @@ pub unsafe extern "C" fn glob(
 
     let mut pathv: Box<Vec<*mut c_char>>;
     if flags & GLOB_APPEND == GLOB_APPEND {
-        pathv = unsafe { Box::from_raw((*pglob).__opaque as *mut _) };
+        pathv = unsafe { Box::from_raw((*pglob).__opaque.cast()) };
         pathv.pop(); // Remove NULL from end
     } else {
         pathv = Box::new(Vec::new());
@@ -144,8 +144,8 @@ pub unsafe extern "C" fn glob(
     pathv.push(ptr::null_mut());
 
     unsafe {
-        (*pglob).gl_pathv = pathv.as_ptr() as *mut *mut c_char;
-        (*pglob).__opaque = Box::into_raw(pathv) as *mut _;
+        (*pglob).gl_pathv = pathv.as_ptr().cast_mut();
+        (*pglob).__opaque = Box::into_raw(pathv).cast();
     }
 
     0
@@ -157,7 +157,7 @@ pub unsafe extern "C" fn glob(
 pub unsafe extern "C" fn globfree(pglob: *mut glob_t) {
     // Retake ownership
     if unsafe { !(*pglob).__opaque.is_null() } {
-        let pathv: Box<Vec<*mut c_char>> = unsafe { Box::from_raw((*pglob).__opaque as *mut _) };
+        let pathv: Box<Vec<*mut c_char>> = unsafe { Box::from_raw((*pglob).__opaque.cast()) };
         for (idx, path) in pathv.into_iter().enumerate() {
             if unsafe { idx < (*pglob).gl_offs } {
                 continue;
@@ -195,7 +195,7 @@ fn list_dir(
 
     let old_errno = platform::ERRNO.get();
     let mut results: Vec<DirEntry> = Vec::new();
-    let open_path = if path.to_bytes().len() == 0 {
+    let open_path = if path.to_bytes().is_empty() {
         unsafe { &CStr::from_bytes_with_nul_unchecked(b".\0") }
     } else {
         path
@@ -241,13 +241,13 @@ fn list_dir(
 
                 let mut link_info = stat::default();
                 if stat(
-                    full_path.as_ptr() as *const c_char,
-                    &mut link_info as *mut _,
+                    full_path.as_ptr().cast::<c_char>(),
+                    ptr::from_mut(&mut link_info),
                 ) != 0
                 {
                     let errno = platform::ERRNO.get();
                     platform::ERRNO.set(old_errno);
-                    if errfunc(full_path.as_ptr() as *const c_char, errno) != 0 || abort_on_error {
+                    if errfunc(full_path.as_ptr().cast::<c_char>(), errno) != 0 || abort_on_error {
                         return Err(GLOB_ABORTED);
                     }
                 }
@@ -288,7 +288,7 @@ fn inner_glob(
     // Remove any '/' chars at the start of the expression
     let glob_expr = {
         let mut expr = glob_expr.to_bytes_with_nul();
-        while expr.get(0) == Some(&b'/') {
+        while expr.first() == Some(&b'/') {
             expr = &expr[1..];
         }
         unsafe { CStr::from_bytes_with_nul_unchecked(expr) }
@@ -353,7 +353,7 @@ fn inner_glob(
 
     for entry in list_dir(current_dir, errfunc, flags & GLOB_ERR == GLOB_ERR)? {
         // If we still have pattern to match ignore non-directories
-        if new_glob_expr.to_bytes().len() != 0 && !entry.is_dir {
+        if !new_glob_expr.to_bytes().is_empty() && !entry.is_dir {
             continue;
         }
 
@@ -373,7 +373,7 @@ fn inner_glob(
 
         if unsafe {
             fnmatch(
-                pattern.as_ptr() as *const c_char,
+                pattern.as_ptr().cast::<c_char>(),
                 entry.name.as_ptr(),
                 fnmatch_flags,
             )
@@ -389,15 +389,15 @@ fn inner_glob(
     }
 
     // It is an error if we don't find a directory when we expect one
-    if matches.len() == 0 && new_glob_expr.to_bytes().len() != 0 {
+    if matches.is_empty() && !new_glob_expr.to_bytes().is_empty() {
         let mut path = current_dir.to_bytes().to_vec();
         path.extend_from_slice(&pattern);
-        if unsafe { errfunc(path.as_ptr() as *const c_char, ENOENT) } != 0
+        if unsafe { errfunc(path.as_ptr().cast::<c_char>(), ENOENT) } != 0
             || flags & GLOB_ERR == GLOB_ERR
         {
             return Err(GLOB_ABORTED);
         }
     }
 
-    return Ok(matches);
+    Ok(matches)
 }