1 files changed, 2 insertions, 0 deletions
diff --git a/src/n3.c b/src/n3.c
index 4f7ddd47..662ea3f9 100644
--- a/src/n3.c
+++ b/src/n3.c
@@ -1696,6 +1696,8 @@ read_n3_statement(SerdReader* const reader)
 SerdStatus
 serd_reader_skip_until_byte(SerdReader* const reader, const uint8_t byte)
 {
+  assert(reader);
+
   int c = peek_byte(reader);
 
   while (c != byte && c != EOF) {