diff --git a/edm4hep.yaml b/edm4hep.yaml
index 70da4d379..cb930a968 100644
--- a/edm4hep.yaml
+++ b/edm4hep.yaml
@@ -50,7 +50,7 @@ components:
         constexpr Vector3d(double xx, double yy, double zz) : x(xx),y(yy),z(zz) {}\n
         constexpr Vector3d(const double* v) : x(v[0]),y(v[1]),z(v[2]) {}\n
         constexpr Vector3d(const float* v) : x(v[0]),y(v[1]),z(v[2]) {}\n
-        [[ deprecated("This constructor will be removed again it is mainly here for an easier transition") ]]\n
+        [[ deprecated(\"This constructor will be removed again it is mainly here for an easier transition\") ]]\n
         constexpr Vector3d(const Vector3f& v) : x(v.x), y(v.y), z(v.z) {}\n
         constexpr bool operator==(const Vector3d& v) const { return (x==v.x&&y==v.y&&z==v.z) ; }\n
         constexpr double operator[](unsigned i) const { return *( &x + i ) ; }\n