1 files changed, 5 insertions, 2 deletions
diff --git a/umac32.c b/umac32.c
index 98f987e9..ce859c15 100644
--- a/umac32.c
+++ b/umac32.c
@@ -101,8 +101,11 @@ umac32_digest (struct umac32_ctx *ctx,
     }
   assert (ctx->count > 0);
   if ( !(ctx->nonce_low & _UMAC_NONCE_CACHED))
-    aes_encrypt (&ctx->pdf_key, AES_BLOCK_SIZE,
-		 (uint8_t *) ctx->pad_cache, ctx->nonce);
+    {
+      aes_encrypt (&ctx->pdf_key, AES_BLOCK_SIZE,
+		   (uint8_t *) ctx->pad_cache, ctx->nonce);
+      ctx->nonce_low |= _UMAC_NONCE_CACHED;
+    }
 
   pad = ctx->pad_cache[ctx->nonce_low & 3];