diff --git a/rust/src/function.rs b/rust/src/function.rs
index 78b7da9f3..48f02205b 100644
--- a/rust/src/function.rs
+++ b/rust/src/function.rs
@@ -40,7 +40,7 @@ pub use binaryninjacore_sys::BNFunctionAnalysisSkipOverride as FunctionAnalysisS
 pub use binaryninjacore_sys::BNFunctionUpdateType as FunctionUpdateType;
 
 use std::{fmt, mem};
-use std::{hash::Hash, ops::Range};
+use std::{ffi::c_char, hash::Hash, ops::Range};
 
 pub struct Location {
     pub arch: Option<CoreArchitecture>,
@@ -1499,7 +1499,7 @@ impl Function {
         let arch = arch.unwrap_or_else(|| self.arch());
         let enum_display_typeid = enum_display_typeid.map(BnStrCompatible::into_bytes_with_nul);
         let enum_display_typeid_ptr = enum_display_typeid
-            .map(|x| x.as_ref().as_ptr() as *const i8)
+            .map(|x| x.as_ref().as_ptr() as *const c_char)
             .unwrap_or(core::ptr::null());
         unsafe {
             BNSetIntegerConstantDisplayType(
@@ -1944,7 +1944,7 @@ impl Function {
             .iter()
             .position(|(alias, _value)| *alias == name)
         {
-            let name = DEBUG_REPORT_ALIAS[alias_idx].1.as_ptr() as *const i8;
+            let name = DEBUG_REPORT_ALIAS[alias_idx].1.as_ptr() as *const c_char;
             unsafe { BNRequestFunctionDebugReport(self.handle, name) }
         } else {
             let name = std::ffi::CString::new(name.to_string()).unwrap();
diff --git a/rust/src/mlil/function.rs b/rust/src/mlil/function.rs
index e0856b931..3a3ce5e84 100644
--- a/rust/src/mlil/function.rs
+++ b/rust/src/mlil/function.rs
@@ -1,4 +1,5 @@
 use core::hash::{Hash, Hasher};
+use std::ffi::c_char;
 
 use binaryninjacore_sys::*;
 
@@ -127,7 +128,7 @@ impl MediumLevelILFunction {
                 self.get_function().handle,
                 offset,
                 &mut raw_var_type,
-                name.as_ref().as_ptr() as *const i8,
+                name.as_ref().as_ptr() as *const c_char,
             )
         }
     }
@@ -270,7 +271,7 @@ impl MediumLevelILFunction {
                 self.get_function().handle,
                 offset,
                 &mut var_type,
-                name_c_str.as_ptr() as *const i8,
+                name_c_str.as_ptr() as *const c_char,
             )
         }
     }
@@ -295,7 +296,7 @@ impl MediumLevelILFunction {
                 self.get_function().handle,
                 &var.raw(),
                 &mut var_type,
-                name_c_str.as_ptr() as *const i8,
+                name_c_str.as_ptr() as *const c_char,
                 ignore_disjoint_uses,
             )
         }