diff --git a/ChangeLog.d/psa_rsa_needs_pk.txt b/ChangeLog.d/psa_rsa_needs_pk.txt
index 3421aff..995963d 100644
--- a/ChangeLog.d/psa_rsa_needs_pk.txt
+++ b/ChangeLog.d/psa_rsa_needs_pk.txt
@@ -1,3 +1,5 @@
 Bugfix
    * Fix build failure with MBEDTLS_RSA_C and MBEDTLS_PSA_CRYPTO_C but not
      MBEDTLS_USE_PSA_CRYPTO or MBEDTLS_PK_WRITE_C. Fixes #6408.
+   * Fix build failure with MBEDTLS_RSA_C and MBEDTLS_PSA_CRYPTO_C but not
+     MBEDTLS_PK_PARSE_C. Fixes #6409.
diff --git a/include/mbedtls/build_info.h b/include/mbedtls/build_info.h
index 21e63f1..b043789 100644
--- a/include/mbedtls/build_info.h
+++ b/include/mbedtls/build_info.h
@@ -79,11 +79,12 @@
  * and also even without USE_PSA_CRYPTO for mbedtls_pk_sign_ext().
  * PSA crypto also needs pk_write to export RSA keys (otherwise the build
  * goes through but psa_export_key() and psa_export_public_key() fail on
- * RSA keys).
+ * RSA keys), and pk_parse to work with RSA keys in almost any way.
  */
 #if defined(MBEDTLS_PSA_CRYPTO_C) && defined(MBEDTLS_RSA_C)
 #define MBEDTLS_PK_C
 #define MBEDTLS_PK_WRITE_C
+#define MBEDTLS_PK_PARSE_C
 #endif
 
 /* Under MBEDTLS_USE_PSA_CRYPTO, the pk module needs pk_write functions
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index fa41604..30ab9ba 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1572,11 +1572,11 @@
   scripts/config.py unset MBEDTLS_PEM_WRITE_C
   scripts/config.py unset MBEDTLS_PKCS12_C
   scripts/config.py unset MBEDTLS_PKCS5_C
-  # MBEDTLS_PK_WRITE_C is actually currently needed for RSA key export,
-  # but build_info.h will reenable it.
+  # MBEDTLS_PK_PARSE_C and MBEDTLS_PK_WRITE_C are actually currently needed
+  # in PSA code to work with RSA keys. We don't require users to set those:
+  # they will be reenabled in build_info.h.
+  scripts/config.py unset MBEDTLS_PK_PARSE_C
   scripts/config.py unset MBEDTLS_PK_WRITE_C
-  # At this time, we can't unset MBEDTLS_PK_PARSE_C, because it's needed
-  # for RSA in PSA (see https://github.com/Mbed-TLS/mbedtls/issues/6408).
   make CFLAGS='-O1 -Werror' all test
   are_empty_libraries library/libmbedx509.* library/libmbedtls.*
 }