diff --git a/include/omath/engines/cry_engine/formulas.hpp b/include/omath/engines/cry_engine/formulas.hpp
index 3739b67..0338260 100644
--- a/include/omath/engines/cry_engine/formulas.hpp
+++ b/include/omath/engines/cry_engine/formulas.hpp
@@ -8,7 +8,7 @@
 namespace omath::cry_engine
 {
     [[nodiscard]]
-    OMATH_CONSTEXPR Mat4X4 rotation_matrix(const ViewAngles& angles) noexcept
+    inline OMATH_CONSTEXPR Mat4X4 rotation_matrix(const ViewAngles& angles) noexcept
     {
         return mat_rotation_axis_z<float, MatStoreType::ROW_MAJOR>(angles.yaw)
                * mat_rotation_axis_y<float, MatStoreType::ROW_MAJOR>(angles.roll)
@@ -16,7 +16,7 @@ namespace omath::cry_engine
     }
 
     [[nodiscard]]
-    OMATH_CONSTEXPR Vector3<float> forward_vector(const ViewAngles& angles) noexcept
+    inline OMATH_CONSTEXPR Vector3<float> forward_vector(const ViewAngles& angles) noexcept
     {
         const auto vec = rotation_matrix(angles) * mat_column_from_vector(k_abs_forward);
 
@@ -24,7 +24,7 @@ namespace omath::cry_engine
     }
 
     [[nodiscard]]
-    OMATH_CONSTEXPR Vector3<float> right_vector(const ViewAngles& angles) noexcept
+    inline OMATH_CONSTEXPR Vector3<float> right_vector(const ViewAngles& angles) noexcept
     {
         const auto vec = rotation_matrix(angles) * mat_column_from_vector(k_abs_right);
 
@@ -32,7 +32,7 @@ namespace omath::cry_engine
     }
 
     [[nodiscard]]
-    OMATH_CONSTEXPR Vector3<float> up_vector(const ViewAngles& angles) noexcept
+    inline OMATH_CONSTEXPR Vector3<float> up_vector(const ViewAngles& angles) noexcept
     {
         const auto vec = rotation_matrix(angles) * mat_column_from_vector(k_abs_up);
 
@@ -40,26 +40,26 @@ namespace omath::cry_engine
     }
 
     [[nodiscard]]
-    OMATH_CONSTEXPR Mat4X4 calc_view_matrix(const ViewAngles& angles, const Vector3<float>& cam_origin) noexcept
+    inline OMATH_CONSTEXPR Mat4X4 calc_view_matrix(const ViewAngles& angles, const Vector3<float>& cam_origin) noexcept
     {
         return mat_camera_view<float, MatStoreType::ROW_MAJOR>(forward_vector(angles), right_vector(angles),
                                                                up_vector(angles), cam_origin);
     }
 
     [[nodiscard]]
-    OMATH_CONSTEXPR Vector3<float> extract_origin(const Mat4X4& mat) noexcept
+    inline OMATH_CONSTEXPR Vector3<float> extract_origin(const Mat4X4& mat) noexcept
     {
         return mat_extract_origin(mat);
     }
 
     [[nodiscard]]
-    OMATH_CONSTEXPR Vector3<float> extract_scale(const Mat4X4& mat) noexcept
+    inline OMATH_CONSTEXPR Vector3<float> extract_scale(const Mat4X4& mat) noexcept
     {
         return mat_extract_scale(mat);
     }
 
     [[nodiscard]]
-    OMATH_CONSTEXPR ViewAngles extract_rotation_angles(const Mat4X4& mat) noexcept
+    inline OMATH_CONSTEXPR ViewAngles extract_rotation_angles(const Mat4X4& mat) noexcept
     {
         const auto angles = mat_extract_rotation_zyx(mat);
         return {
@@ -69,8 +69,7 @@ namespace omath::cry_engine
         };
     }
     [[nodiscard]]
-    OMATH_CONSTEXPR Mat4X4
-    calc_perspective_projection_matrix(
+    inline OMATH_CONSTEXPR Mat4X4 calc_perspective_projection_matrix(
             const float field_of_view, const float aspect_ratio, const float near, const float far,
             const NDCDepthRange ndc_depth_range = NDCDepthRange::ZERO_TO_ONE) noexcept
     {