diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index c58d22a..5be1b51 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -57,20 +57,6 @@
  * @{
  */
 
-#if defined(PSA_SUCCESS)
-/* If PSA_SUCCESS is defined, assume that PSA crypto is being used
- * together with PSA IPC, which also defines the identifier
- * PSA_SUCCESS. We must not define PSA_SUCCESS ourselves in that case;
- * the other error code names don't clash. Also define psa_status_t as
- * an alias for the type used by PSA IPC. This is a temporary hack
- * until we unify error reporting in PSA IPC and PSA crypto.
- *
- * Note that psa_defs.h must be included before this header!
- */
-typedef psa_error_t psa_status_t;
-
-#else /* defined(PSA_SUCCESS) */
-
 /**
  * \brief Function return status.
  *
@@ -80,9 +66,17 @@
  */
 typedef int32_t psa_status_t;
 
+#if !defined(PSA_SUCCESS)
+/* If PSA_SUCCESS is defined, assume that PSA crypto is being used
+ * together with PSA IPC, which also defines the identifier
+ * PSA_SUCCESS. We must not define PSA_SUCCESS ourselves in that case;
+ * the other error code names don't clash. This is a temporary hack
+ * until we unify error reporting in PSA IPC and PSA crypto.
+ *
+ * Note that psa_defs.h must be included before this header!
+ */
 /** The action was completed successfully. */
 #define PSA_SUCCESS ((psa_status_t)0)
-
 #endif /* !defined(PSA_SUCCESS) */
 
 /** An error occurred that does not correspond to any defined