diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index c92ab7f..9851560 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -2027,8 +2027,9 @@
             }
             else
             {
-                MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
-                return( ret );
+                MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret",
+                                       MBEDTLS_ERR_PLATFORM_FAULT_DETECTED );
+                return( MBEDTLS_ERR_PLATFORM_FAULT_DETECTED );
             }
         }
         else