diff --git a/lib/hkStubs/Havok/Common/Base/Math/Vector/hkVector4f.h b/lib/hkStubs/Havok/Common/Base/Math/Vector/hkVector4f.h
index c6b8390f..21caf846 100644
--- a/lib/hkStubs/Havok/Common/Base/Math/Vector/hkVector4f.h
+++ b/lib/hkStubs/Havok/Common/Base/Math/Vector/hkVector4f.h
@@ -40,6 +40,8 @@ public:
     HK_FORCE_INLINE void setMul(hkVector4fParameter a, hkVector4fParameter b);
     HK_FORCE_INLINE void setDiv(hkVector4fParameter a, hkVector4fParameter b);
 
+    HK_FORCE_INLINE void add(hkSimdFloat32Parameter a);
+    HK_FORCE_INLINE void sub(hkSimdFloat32Parameter a);
     HK_FORCE_INLINE void mul(hkSimdFloat32Parameter a);
     HK_FORCE_INLINE void setMul(hkVector4fParameter a, hkSimdFloat32Parameter r);
     HK_FORCE_INLINE void setMul(hkSimdFloat32Parameter r, hkVector4fParameter a);
diff --git a/lib/hkStubs/Havok/Common/Base/Math/Vector/hkVector4f.inl b/lib/hkStubs/Havok/Common/Base/Math/Vector/hkVector4f.inl
index 853c8ae7..eeee70c3 100644
--- a/lib/hkStubs/Havok/Common/Base/Math/Vector/hkVector4f.inl
+++ b/lib/hkStubs/Havok/Common/Base/Math/Vector/hkVector4f.inl
@@ -95,6 +95,14 @@ inline void hkVector4f::setDiv(hkVector4fParameter a, hkVector4fParameter b) {
     v = a.v / b.v;
 }
 
+inline void hkVector4f::add(hkSimdFloat32Parameter a) {
+    setAdd(*this, a);
+}
+
+inline void hkVector4f::sub(hkSimdFloat32Parameter a) {
+    setSub(*this, a);
+}
+
 inline void hkVector4f::mul(hkSimdFloat32Parameter a) {
     setMul(*this, a);
 }