diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index bb07c8b..c3a01df 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -871,7 +871,7 @@
     if (flags & DOCMD_EXCRESET)
 	save_dbg_stuff(&debug_saved);
     else
-	vim_memset(&debug_saved, 0, 1);
+	vim_memset(&debug_saved, 0, sizeof(debug_saved));
 
     initial_trylevel = trylevel;