diff --git a/library/entropy.c b/library/entropy.c
index 04de07f..7f95317 100644
--- a/library/entropy.c
+++ b/library/entropy.c
@@ -83,6 +83,9 @@
 
 void entropy_free( entropy_context *ctx )
 {
+#if defined(POLARSSL_HAVEGE_C)
+    havege_free( &ctx->havege_data );
+#endif
     polarssl_zeroize( ctx, sizeof( entropy_context ) );
 #if defined(POLARSSL_THREADING_C)
     polarssl_mutex_free( &ctx->mutex );