Making version features easily ROM-able when using Arm C compiler.
diff --git a/scripts/data_files/version_features.fmt b/scripts/data_files/version_features.fmt
index 767eda1..63ae94c 100644
--- a/scripts/data_files/version_features.fmt
+++ b/scripts/data_files/version_features.fmt
@@ -31,7 +31,7 @@
 
 #include <string.h>
 
-static const char *features[] = {
+static const char * const features[] = {
 #if defined(MBEDTLS_VERSION_FEATURES)
 FEATURE_DEFINES
 #endif /* MBEDTLS_VERSION_FEATURES */
@@ -40,7 +40,7 @@
 
 int mbedtls_version_check_feature( const char *feature )
 {
-    const char **idx = features;
+    const char * const *idx = features;
 
     if( *idx == NULL )
         return( -2 );