diff --git a/crates/algorithms/src/crc/ffi/crc32.rs b/crates/algorithms/src/crc/ffi/crc32.rs
index 0579371..00a6304 100755
--- a/crates/algorithms/src/crc/ffi/crc32.rs
+++ b/crates/algorithms/src/crc/ffi/crc32.rs
@@ -6,9 +6,9 @@ pub type ChecksumCrc32 = u32; // uint32_t in C
 
 unsafe extern "C" {
     fn crc32_new() -> Crc32;
-    fn crc32_process(data: *const c_void, len: u32, crc32: *mut Crc32);
+    fn crc32_process(data: *const u8, len: u32, crc32: *mut Crc32);
 
-    fn crc32_checksum(data: *const c_void, len: u32) -> ChecksumCrc32;
+    fn crc32_checksum(data: *const u8, len: u32) -> ChecksumCrc32;
 }
 
 #[repr(C)]
@@ -28,7 +28,7 @@ impl Crc for Crc32 {
 
     #[inline]
     fn process(&mut self, data: &Self::Input) {
-        unsafe { crc32_process(ref_to_voidptr(data), data.len() as u32, self as *mut Self) }
+        unsafe { crc32_process(data, data.len() as u32, self as *mut Self) }
     }
 
     #[inline]
@@ -38,7 +38,7 @@ impl Crc for Crc32 {
 
     #[inline]
     fn checksum(data: &Self::Input) -> Self::Checksum {
-        unsafe { crc32_checksum(ref_to_voidptr(data), data.len() as u32) }
+        unsafe { crc32_checksum(data, data.len() as u32) }
     }
 }