diff --git a/src/rpp/rpp/subjects/details/subject_state.hpp b/src/rpp/rpp/subjects/details/subject_state.hpp
index 4556653f7..50d0c4c21 100644
--- a/src/rpp/rpp/subjects/details/subject_state.hpp
+++ b/src/rpp/rpp/subjects/details/subject_state.hpp
@@ -124,7 +124,7 @@ class subject_state final : public std::enable_shared_from_this<subject_state<Ty
                     if (shared->m_state_flag & EState::Emitting)
                         shared->m_state_flag |= EState::NeedToCleanup;
                     else 
-                        cleanup_observers(std::get_if<observers>(&shared->m_state));
+                        cleanup_observers(std::get_if<observers_t>(&shared->m_state));
                 }
             })});
     }