diff --git a/src/buffer.c b/src/buffer.c
index 62c396a..4a39329 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -919,10 +919,9 @@
     ml_close(buf, TRUE);	    // close and delete the memline/memfile
     buf->b_ml.ml_line_count = 0;    // no lines in buffer
     if ((flags & BFA_KEEP_UNDO) == 0)
-    {
-	u_blockfree(buf);	    // free the memory allocated for undo
-	u_clearall(buf);	    // reset all undo information
-    }
+	// free the memory allocated for undo
+	// and reset all undo information
+	u_clearallandblockfree(buf);
 #ifdef FEAT_SYN_HL
     syntax_clear(&buf->b_s);	    // reset syntax info
 #endif