1 files changed, 3 insertions, 0 deletions
diff --git a/src/canon.c b/src/canon.c
index 84d20d0c..67cf30bf 100644
--- a/src/canon.c
+++ b/src/canon.c
@@ -23,6 +23,7 @@
 #include "exess/exess.h"
 #include "serd/serd.h"
 
+#include <assert.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
@@ -182,6 +183,8 @@ serd_canon_new(const SerdWorld* const world,
                const SerdSink* const  target,
                const SerdCanonFlags   flags)
 {
+  assert(target);
+
   SerdCanonData* const data = (SerdCanonData*)calloc(1, sizeof(SerdCanonData));
 
   data->world  = world;