diff --git a/src/optimization/solver/InteriorPoint.cpp b/src/optimization/solver/InteriorPoint.cpp
index 6b78d177..c3a1aad6 100644
--- a/src/optimization/solver/InteriorPoint.cpp
+++ b/src/optimization/solver/InteriorPoint.cpp
@@ -622,7 +622,7 @@ void InteriorPoint(std::span<Variable> decisionVariables,
           p_x = fr_x - x;
           p_s = fr_s - s;
 
-          // Lagrange mutliplier estimates
+          // Lagrange multiplier estimates
           //
           //   [y] = (ÂÂᵀ)⁻¹Â[ ∇f]
           //   [z]           [−μe]
diff --git a/src/optimization/solver/SQP.cpp b/src/optimization/solver/SQP.cpp
index 3869dcf4..8481ae6c 100644
--- a/src/optimization/solver/SQP.cpp
+++ b/src/optimization/solver/SQP.cpp
@@ -438,7 +438,7 @@ void SQP(std::span<Variable> decisionVariables,
             SolverExitCondition::kCallbackRequestedStop) {
           p_x = fr_x - x;
 
-          // Lagrange mutliplier estimates
+          // Lagrange multiplier estimates
           //
           //   y = (AₑAₑᵀ)⁻¹Aₑ∇f
           //