Fix typos

2 files changed, 3 insertions, 3 deletions

diff --git a/include/ruby/internal/intern/gc.h b/include/ruby/internal/intern/gc.h
index 1617a7cef6..d8e476b078 100644
--- a/include/ruby/internal/intern/gc.h
+++ b/include/ruby/internal/intern/gc.h
@@ -249,7 +249,7 @@ void rb_gc(void);
  *
  * @internal
  *
- * But isn't it  easier for you to call super,  and let `Object#intialize_copy`
+ * But isn't it  easier for you to call super,  and let `Object#initialize_copy`
  * call this function instead?
  */
 void rb_gc_copy_finalizer(VALUE dst, VALUE src);
diff --git a/include/ruby/internal/intern/thread.h b/include/ruby/internal/intern/thread.h
index 294e552fe9..716375acd7 100644
--- a/include/ruby/internal/intern/thread.h
+++ b/include/ruby/internal/intern/thread.h
@@ -46,7 +46,7 @@ void rb_thread_schedule(void);
  *
  * @param[in]  fd                    A file descriptor.
  * @exception  rb_eIOError           Closed stream.
- * @exception  rb_eSystemCalleError  Situations like EBADF.
+ * @exception  rb_eSystemCallError   Situations like EBADF.
  */
 int rb_thread_wait_fd(int fd);
 
@@ -56,7 +56,7 @@ int rb_thread_wait_fd(int fd);
  *
  * @param[in]  fd                    A file descriptor.
  * @exception  rb_eIOError           Closed stream.
- * @exception  rb_eSystemCalleError  Situations like EBADF.
+ * @exception  rb_eSystemCallError   Situations like EBADF.
  */
 int rb_thread_fd_writable(int fd);