diff --git a/src/libslic3r/GCode/GCodeProcessor.cpp b/src/libslic3r/GCode/GCodeProcessor.cpp
index f4ee8964db..c64725e508 100644
--- a/src/libslic3r/GCode/GCodeProcessor.cpp
+++ b/src/libslic3r/GCode/GCodeProcessor.cpp
@@ -2375,7 +2375,7 @@ void GCodeProcessor::process_G1(const GCodeReader::GCodeLine& line)
         const Vec3f curr_pos(m_end_position[X], m_end_position[Y], m_end_position[Z]);
         const Vec3f new_pos = m_result.moves.back().position - m_extruder_offsets[m_extruder_id];
         const std::optional<Vec3f> first_vertex = m_seams_detector.get_first_vertex();
-        const Vec3f mid_pos = 0.5f * (new_pos + first_vertex.value());
+        const Vec3f mid_pos = 0.5f * (new_pos + *first_vertex);
         set_end_position(mid_pos);
         store_move_vertex(EMoveType::Seam);
         set_end_position(curr_pos);