diff --git a/library/version_features.c b/library/version_features.c
index adaf5de..5055086 100644
--- a/library/version_features.c
+++ b/library/version_features.c
@@ -37,7 +37,7 @@
 #define strcasecmp _stricmp
 #endif
 
-const char *features[] = {
+static const char *features[] = {
 #if defined(POLARSSL_VERSION_FEATURES)
 #if defined(POLARSSL_HAVE_INT8)
     "POLARSSL_HAVE_INT8",