1 files changed, 9 insertions, 1 deletions
diff --git a/src/env.c b/src/env.c
index 29df5286..49d2efa2 100644
--- a/src/env.c
+++ b/src/env.c
@@ -115,7 +115,7 @@ serd_env_base_uri_view(const SerdEnv* env)
 const SerdNode*
 serd_env_base_uri(const SerdEnv* env)
 {
-  return env->base_uri_node;
+  return env ? env->base_uri_node : NULL;
 }
 
 SerdStatus
@@ -202,6 +202,10 @@ serd_env_qualify_in_place(const SerdEnv*   env,
                           const SerdNode** prefix,
                           SerdStringView*  suffix)
 {
+  if (!env) {
+    return false;
+  }
+
   for (size_t i = 0; i < env->n_prefixes; ++i) {
     const SerdNode* const prefix_uri = env->prefixes[i].uri;
     if (uri->n_bytes >= prefix_uri->n_bytes) {
@@ -244,6 +248,10 @@ serd_env_expand_in_place(const SerdEnv*  env,
                          SerdStringView* uri_prefix,
                          SerdStringView* uri_suffix)
 {
+  if (!env) {
+    return SERD_ERR_BAD_CURIE;
+  }
+
   const char* const str   = serd_node_string(curie);
   const char* const colon = (const char*)memchr(str, ':', curie->n_bytes + 1);
   if (curie->type != SERD_CURIE || !colon) {