diff --git a/src/libutil-c/nix_api_util.h b/src/libutil-c/nix_api_util.h
index 43f9fa9dc..5f42641d4 100644
--- a/src/libutil-c/nix_api_util.h
+++ b/src/libutil-c/nix_api_util.h
@@ -47,7 +47,7 @@ extern "C" {
  */
 // Error codes
 /**
- * @brief Type for error codes in the NIX system
+ * @brief Type for error codes in the Nix system
  *
  * This type can have one of several predefined constants:
  * - NIX_OK: No error occurred (0)