diff --git a/src/tests/fuzzing/fuzz_pkcs15_reader.c b/src/tests/fuzzing/fuzz_pkcs15_reader.c
index 105ea886..9bac1309 100644
--- a/src/tests/fuzzing/fuzz_pkcs15_reader.c
+++ b/src/tests/fuzzing/fuzz_pkcs15_reader.c
@@ -63,7 +63,7 @@ void fuzz_get_chunk(sc_reader_t *reader, const uint8_t **chunk, uint16_t *chunk_
     }
 
     data->Size -= sizeof *chunk_size;
-    *chunk_size = (uint16_t) data->Data;
+    *chunk_size = (uint16_t) *data->Data;
     data->Data += sizeof *chunk_size;
     *chunk = data->Data;