diff --git a/deltachat-ffi/src/lib.rs b/deltachat-ffi/src/lib.rs
index 64ebd782f..bdb89109e 100644
--- a/deltachat-ffi/src/lib.rs
+++ b/deltachat-ffi/src/lib.rs
@@ -1288,7 +1288,7 @@ pub unsafe extern "C" fn dc_continue_key_transfer(
 
     let context = &*context;
 
-    dc_imex::dc_continue_key_transfer(context, msg_id, setup_code)
+    dc_imex::dc_continue_key_transfer(context, msg_id, setup_code) as libc::c_int
 }
 
 #[no_mangle]
diff --git a/examples/repl/cmdline.rs b/examples/repl/cmdline.rs
index bef6fc304..e8edb49cd 100644
--- a/examples/repl/cmdline.rs
+++ b/examples/repl/cmdline.rs
@@ -496,7 +496,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                 !arg1.is_empty() && !arg2.is_empty(),
                 "Arguments <msg-id> <setup-code> expected"
             );
-            if 0 == dc_continue_key_transfer(context, arg1.parse()?, arg2_c) {
+            if !dc_continue_key_transfer(context, arg1.parse()?, arg2_c) {
                 bail!("Continue key transfer failed");
             }
         }
diff --git a/src/dc_imex.rs b/src/dc_imex.rs
index bafe83126..50aa9780f 100644
--- a/src/dc_imex.rs
+++ b/src/dc_imex.rs
@@ -268,13 +268,12 @@ pub fn dc_create_setup_code(_context: &Context) -> String {
     ret
 }
 
-// TODO should return bool /rtn
 pub unsafe fn dc_continue_key_transfer(
     context: &Context,
     msg_id: uint32_t,
     setup_code: *const libc::c_char,
-) -> libc::c_int {
-    let mut success: libc::c_int = 0i32;
+) -> bool {
+    let mut success = false;
     let mut filename: *mut libc::c_char = ptr::null_mut();
     let mut filecontent: *mut libc::c_char = ptr::null_mut();
     let mut filebytes: size_t = 0i32 as size_t;
@@ -313,7 +312,7 @@ pub unsafe fn dc_continue_key_transfer(
                 } else if set_self_key(context, armored_key, 1) {
                     /*set default*/
                     /* error already logged */
-                    success = 1i32
+                    success = true
                 }
             }
         }