diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 3dfc347e9a6446b2a432027652e57a427b52845e..c256f6670cbb26e88ef703f4c51a9647c54d6a5e 100755
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1370,7 +1370,7 @@
  * Enable an implementation of SHA-256 that has lower ROM footprint but also
  * lower performance.
  *
- * The default implementation is meant to be a reasonnable compromise between
+ * The default implementation is meant to be a reasonable compromise between
  * performance and size. This version optimizes more aggressively for size at
  * the expense of performance. Eg on Cortex-M4 it reduces the size of
  * mbedtls_sha256_process() from ~2KB to ~0.5KB for a performance hit of about