diff --git a/src/gc_pcsaft/dft/mod.rs b/src/gc_pcsaft/dft/mod.rs
index b3b600485..65809f69f 100644
--- a/src/gc_pcsaft/dft/mod.rs
+++ b/src/gc_pcsaft/dft/mod.rs
@@ -153,6 +153,7 @@ impl FluidParameters for GcPcSaftFunctional {
     }
 }
 
+/// Individual contributions for the gc-PC-SAFT Helmholtz energy functional.
 #[derive(FunctionalContribution)]
 pub enum GcPcSaftFunctionalContribution {
     Fmt(FMTContribution<GcPcSaftFunctionalParameters>),
diff --git a/src/hard_sphere/mod.rs b/src/hard_sphere/mod.rs
index eb2f0bd9f..28094d7c2 100644
--- a/src/hard_sphere/mod.rs
+++ b/src/hard_sphere/mod.rs
@@ -10,7 +10,9 @@ use std::{borrow::Cow, sync::Arc};
 #[cfg(feature = "dft")]
 mod dft;
 #[cfg(feature = "dft")]
-pub use dft::{FMTContribution, FMTFunctional, FMTVersion, HardSphereParameters};
+pub(crate) use dft::HardSphereParameters;
+#[cfg(feature = "dft")]
+pub use dft::{FMTContribution, FMTFunctional, FMTVersion};
 
 /// Different monomer shapes for FMT and BMCSL.
 pub enum MonomerShape<'a, D> {
diff --git a/src/pcsaft/dft/mod.rs b/src/pcsaft/dft/mod.rs
index 5fa35414b..5d0051856 100644
--- a/src/pcsaft/dft/mod.rs
+++ b/src/pcsaft/dft/mod.rs
@@ -153,6 +153,7 @@ impl PairPotential for PcSaftFunctional {
     }
 }
 
+/// Individual contributions for the PC-SAFT Helmholtz energy functional.
 #[derive(FunctionalContribution)]
 pub enum PcSaftFunctionalContribution {
     PureFMTAssoc(PureFMTAssocFunctional),
diff --git a/src/saftvrqmie/dft/mod.rs b/src/saftvrqmie/dft/mod.rs
index f972601b1..da604f8d5 100644
--- a/src/saftvrqmie/dft/mod.rs
+++ b/src/saftvrqmie/dft/mod.rs
@@ -134,6 +134,7 @@ impl PairPotential for SaftVRQMieFunctional {
     }
 }
 
+/// Individual contributions for the SAFT-VRQ Mie Helmholtz energy functional.
 #[derive(FunctionalContribution)]
 pub enum SaftVRQMieFunctionalContribution {
     Fmt(FMTContribution<SaftVRQMieParameters>),