diff --git a/library/pk.c b/library/pk.c
index eaaa371..9eddb61 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -598,6 +598,7 @@
 
     if( ret_fi == UECC_SUCCESS )
     {
+        mbedtls_platform_enforce_volatile_reads();
         if( ret_fi == UECC_SUCCESS )
             return( 0 );
         else