diff --git a/doxygen/input/doc_hashing.h b/doxygen/input/doc_hashing.h
index 42a3754..931e6e9 100644
--- a/doxygen/input/doc_hashing.h
+++ b/doxygen/input/doc_hashing.h
@@ -34,7 +34,7 @@
  * \c mbedtls_md_setup())
  *
  * The following hashing-algorithms are provided:
- * - MD5 128-bit one-way hash functions by Ron Rivest.
+ * - MD5 128-bit one-way hash function by Ron Rivest.
  * - SHA-1, SHA-256, SHA-384/512 160-bit or more one-way hash functions by
  *   NIST and NSA.
  *