diff --git a/library/pk_wrap.c b/library/pk_wrap.c
index 107e912..d89ebb9 100644
--- a/library/pk_wrap.c
+++ b/library/pk_wrap.c
@@ -941,7 +941,7 @@
 
     /* this is only reached if the signature was invalid */
     if( len == 0 )
-        return( MBEDTLS_ERR_PK_HW_ACCEL_FAILED );
+        return( MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED );
 
     /* if the msb is 1, ASN.1 requires that we prepend a 0.
      * Neither r nor s can be 0, so we can assume len > 0 at all times. */