diff --git a/faiss-sys/src/lib.rs b/faiss-sys/src/lib.rs
index fc8eaf4..c0505fd 100644
--- a/faiss-sys/src/lib.rs
+++ b/faiss-sys/src/lib.rs
@@ -12,18 +12,6 @@ mod bindings;
 #[cfg(not(feature = "gpu"))]
 pub use bindings::*;
 
-pub fn bool_as_c_int(v: bool) -> ::std::os::raw::c_int {
-    if v {
-        1
-    } else {
-        0
-    }
-}
-
-pub fn c_int_as_bool(v: ::std::os::raw::c_int) -> bool {
-    v != 0
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/src/index/id_map.rs b/src/index/id_map.rs
index 93d924b..c836d2f 100644
--- a/src/index/id_map.rs
+++ b/src/index/id_map.rs
@@ -64,6 +64,7 @@ use faiss_sys::*;
 
 use std::marker::PhantomData;
 use std::mem;
+use std::os::raw::c_int;
 use std::ptr;
 
 /// Wrapper for implementing arbitrary ID mapping to an index.
@@ -264,13 +265,12 @@ impl<I> Index for IdMap<I> {
     }
 
     fn verbose(&self) -> bool {
-        unsafe { c_int_as_bool(faiss_Index_verbose(self.inner_ptr())) }
+        unsafe { faiss_Index_verbose(self.inner_ptr()) != 0 }
     }
 
     fn set_verbose(&mut self, value: bool) {
         unsafe {
-            let val_ = bool_as_c_int(value);
-            faiss_Index_set_verbose(self.inner_ptr(), val_);
+            faiss_Index_set_verbose(self.inner_ptr(), c_int::from(value));
         }
     }
 }
diff --git a/src/macros.rs b/src/macros.rs
index 404810b..6451dfc 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -124,13 +124,12 @@ macro_rules! impl_native_index {
             }
 
             fn verbose(&self) -> bool {
-                unsafe { c_int_as_bool(faiss_Index_verbose(self.inner_ptr())) }
+                unsafe { faiss_Index_verbose(self.inner_ptr()) != 0 }
             }
 
             fn set_verbose(&mut self, value: bool) {
                 unsafe {
-                    let val_ = bool_as_c_int(value);
-                    faiss_Index_set_verbose(self.inner_ptr(), val_);
+                    faiss_Index_set_verbose(self.inner_ptr(), std::os::raw::c_int::from(value));
                 }
             }
         }