diff --git a/scripts/data_files/query_config.fmt b/scripts/data_files/query_config.fmt
index b22474a..8b0057c 100644
--- a/scripts/data_files/query_config.fmt
+++ b/scripts/data_files/query_config.fmt
@@ -101,7 +101,7 @@
 
 #define STRINGIFY(macro)  #macro
 #define OUTPUT_MACRO_NAME_VALUE(macro) mbedtls_printf( #macro "%s\n",   \
-    STRINGIFY(macro)[0] != 0 ? "=" STRINGIFY(macro) : "" )
+    ( STRINGIFY(macro) "" )[0] != 0 ? "=" STRINGIFY(macro) : "" )
 
 #if defined(_MSC_VER)
 /*