diff --git a/src/lib.rs b/src/lib.rs
index 6ba5afc..47d430b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -89,9 +89,12 @@ pick! {
     target_arch = "aarch64",
     target_arch = "msp430",
   ))] {
-    // c_char is unsigned (unless macos)
+    // c_char is unsigned (unless using apple)
     pick! {
-      if #[cfg(target_os = "macos")] {
+      if #[cfg(any(
+        target_os = "macos",
+        target_os = "ios",
+      ))] {
         pub type c_char = c_schar;
       } else {
         pub type c_char = c_uchar;