diff --git a/Applications/ApplicationsLib/ProjectData.cpp b/Applications/ApplicationsLib/ProjectData.cpp
index 3b574218bfd772c748a9f6707278b89f94932747..b23622d7490d41c76e4f65b23a2b5b0910579573 100644
--- a/Applications/ApplicationsLib/ProjectData.cpp
+++ b/Applications/ApplicationsLib/ProjectData.cpp
@@ -563,7 +563,8 @@ void ProjectData::parseProcesses(
     BaseLib::ConfigTree const& processes_config,
     std::string const& project_directory,
     std::string const& output_directory,
-    ChemistryLib::ChemicalSolverInterface* const chemical_solver_interface)
+    [[maybe_unused]] ChemistryLib::ChemicalSolverInterface* const
+        chemical_solver_interface)
 {
     (void)project_directory;  // to avoid compilation warning
     (void)output_directory;   // to avoid compilation warning