diff --git a/programs/test/query_config.c b/programs/test/query_config.c
index 98b065b..23dc515 100644
--- a/programs/test/query_config.c
+++ b/programs/test/query_config.c
@@ -1538,6 +1538,14 @@
     }
 #endif /* MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH */
 
+#if defined(MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN)
+    if( strcmp( "MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN", config ) == 0 )
+    {
+        MACRO_EXPANSION_TO_STR( MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN );
+        return( 0 );
+    }
+#endif /* MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN */
+
 #if defined(MBEDTLS_TEST_HOOKS)
     if( strcmp( "MBEDTLS_TEST_HOOKS", config ) == 0 )
     {