Fix typo

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/docs/3.0-migration-guide.md b/docs/3.0-migration-guide.md
index 7f866aa..49b870a 100644
--- a/docs/3.0-migration-guide.md
+++ b/docs/3.0-migration-guide.md
@@ -103,7 +103,7 @@
 enabled.
 
 If you were using custom config file with MBEDTLS_SHA256_C enabled, then
-you will need to add `#define MBEDTLS_SHA224_C` option your config.
+you will need to add `#define MBEDTLS_SHA224_C` option to your config.
 Current version of the library does not support enabling MBEDTLS_SHA256_C
 without MBEDTLS_SHA224_C.