1 files changed, 4 insertions, 0 deletions

diff --git a/openbsd-compat/freezero.c b/openbsd-compat/freezero.c
index 3af8f4a73..90b9d3813 100644
--- a/openbsd-compat/freezero.c
+++ b/openbsd-compat/freezero.c
@@ -16,11 +16,15 @@
 
 #include "includes.h"
 
+#include <string.h>
+
 #ifndef HAVE_FREEZERO
 
 void
 freezero(void *ptr, size_t sz)
 {
+        if (ptr == NULL)
+                return;
         explicit_bzero(ptr, sz);
         free(ptr);
 }