1 files changed, 2 insertions, 0 deletions
diff --git a/tal-debug.c b/tal-debug.c
index 99fedb10e..3606cf574 100644
--- a/tal-debug.c
+++ b/tal-debug.c
@@ -76,6 +76,8 @@ __gmp_tmp_debug_alloc (const char *file, int line,
   struct tmp_debug_t        *mark = *markp;
   struct tmp_debug_entry_t  *p;
 
+  ASSERT_ALWAYS (size >= 1);
+
   if (mark == NULL)
     {
       __gmp_assert_header (file, line);