diff --git a/library/hmac_drbg.c b/library/hmac_drbg.c
index fed297f..c7904d0 100644
--- a/library/hmac_drbg.c
+++ b/library/hmac_drbg.c
@@ -314,7 +314,7 @@
     if( ctx == NULL )
         return;
 
-    md_free_ctx( &ctx->md_ctx );
+    md_free( &ctx->md_ctx );
 
     polarssl_zeroize( ctx, sizeof( hmac_drbg_context ) );
 }