diff --git a/src/crc64.h b/src/crc64.h
index 8835f59..717cafe 100644
--- a/src/crc64.h
+++ b/src/crc64.h
@@ -6,4 +6,9 @@
 
 #include <stdint.h>
 
+
+/**
+ * @brief Generates and returns a 64-bit Cyclic Redundancy Check from a
+ *        character string s of length l.
+ */
 uint64_t crc64(const char* s, uint64_t l);