diff --git a/feos-core/CHANGELOG.md b/feos-core/CHANGELOG.md
index af19b95b3..edb29f509 100644
--- a/feos-core/CHANGELOG.md
+++ b/feos-core/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
+### Fixed
+- Fixed a bug that caused the bubble and dew point solvers to ignore the initial values for the opposing phase given by the user if no initial value for temperature/pressure was also given. [#138](https://github.com/feos-org/feos/pull/138)
 
 ## [0.4.0] - 2023-01-27
 ### Added
diff --git a/feos-core/src/phase_equilibria/bubble_dew.rs b/feos-core/src/phase_equilibria/bubble_dew.rs
index f6f8a6c79..e64920c8e 100644
--- a/feos-core/src/phase_equilibria/bubble_dew.rs
+++ b/feos-core/src/phase_equilibria/bubble_dew.rs
@@ -142,7 +142,7 @@ impl<E: EquationOfState> PhaseEquilibrium<E, 2> {
                         tp_spec,
                         p,
                         molefracs_spec,
-                        Some(&x),
+                        molefracs_init.or(Some(&x)),
                         bubble,
                         options,
                     )