diff --git a/src/malloc.c b/src/malloc.c
index ba6ba82..21966aa 100644
--- a/src/malloc.c
+++ b/src/malloc.c
@@ -47,6 +47,7 @@
 	}
 	else
 	{
+		block->next = NULL;
 		context->free_list_head = block;
 	}
 }