diff --git a/openssl/src/crypto/pkey.rs b/openssl/src/crypto/pkey.rs
index e300843e..8b408d29 100644
--- a/openssl/src/crypto/pkey.rs
+++ b/openssl/src/crypto/pkey.rs
@@ -26,7 +26,7 @@ impl PKey {
         }
     }
 
-    /// Create a new `PKey` containing an HAMC key.
+    /// Create a new `PKey` containing an HMAC key.
     pub fn hmac(key: &[u8]) -> Result<PKey, ErrorStack> {
         unsafe {
             assert!(key.len() <= c_int::max_value() as usize);