diff --git a/src/util/pm_buffer.c b/src/util/pm_buffer.c
index 1e79e46718c..5171c5bb3be 100644
--- a/src/util/pm_buffer.c
+++ b/src/util/pm_buffer.c
@@ -84,10 +84,8 @@ pm_buffer_append(pm_buffer_t *buffer, const void *source, size_t length) {
  */
 void
 pm_buffer_append_zeroes(pm_buffer_t *buffer, size_t length) {
-    size_t cursor = buffer->length;
-    if (pm_buffer_append_length(buffer, length)) {
-        memset(buffer->value + cursor, 0, length);
-    }
+    size_t source = 0;
+    pm_buffer_append(buffer, (const void *) source, length);
 }
 
 /**