diff --git a/src/lib.rs b/src/lib.rs
index ea547c3..5017147 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -110,7 +110,7 @@ unsafe fn _mlock(ptr: *mut u8, len: usize) -> bool {
 /// Calls the platform's underlying `munlock(2)` implementation.
 unsafe fn _munlock(ptr: *mut u8, len: usize) -> bool {
     let r = memsec::munlock(ptr, len);
-    if r == false && cfg!(target_os = "windows") {
+    if !r && cfg!(target_os = "windows") {
         // On windows if we munlock 2 times on the same page we get an error.
         // This can happen if we munlock 2 vars that are in the same page.
         return true;