diff --git a/include/mbedtls/x509_csr.h b/include/mbedtls/x509_csr.h
index 6bea9e1..2a1c046 100644
--- a/include/mbedtls/x509_csr.h
+++ b/include/mbedtls/x509_csr.h
@@ -181,7 +181,7 @@
  *                  private key used to sign the CSR when writing it)
  *
  * \param ctx       CSR context to use
- * \param key       Asymetric key to include
+ * \param key       Asymmetric key to include
  */
 void mbedtls_x509write_csr_set_key( mbedtls_x509write_csr *ctx, mbedtls_pk_context *key );