diff --git a/src/binary_c_derivatives.h b/src/binary_c_derivatives.h
index dcf709add47dde78ddd175ab1deffe6d9fd30dce..e44e9b395fc98031925b733e0e5a381acc329f0c 100644
--- a/src/binary_c_derivatives.h
+++ b/src/binary_c_derivatives.h
@@ -281,6 +281,7 @@
             (STAR)->derivative[DERIVATIVE_STELLAR_MASS_NONCONSERVATIVE_LOSS] = \
             (STAR)->derivative[DERIVATIVE_STELLAR_MASS_ARTIFICIAL] =    \
             (STAR)->derivative[DERIVATIVE_STELLAR_MASS_IRRADIATIVE_LOSS] = \
+            (STAR)->derivative[DERIVATIVE_STELLAR_H_LAYER_MASS] =       \
             (STAR)->derivative[DERIVATIVE_STELLAR_MASS] =               \
             0.0;                                                        \
     }