diff --git a/src/compr_quant.h b/src/compr_quant.h
index b35311768..cacfb5511 100644
--- a/src/compr_quant.h
+++ b/src/compr_quant.h
@@ -29,21 +29,15 @@ extern "C" {
 #endif
 
 struct compr_quantities {
-    int     nphases;      /* Number of phases/components */
+    int           nphases;      /* Number of phases/components */
 
+    double *totcompr;     /* Total compressibility per cell */
+    double *voldiscr;     /* Volume discrepancy per cell */
     double *Ac;           /* RB^{-1} per cell */
-    double *dAc;          /* d/dp (RB^{-1}) per cell */
     double *Af;           /* RB^{-1} per face */
     double *phasemobf;    /* Phase mobility per face */
-    double *voldiscr;     /* Volume discrepancy per cell */
 };
 
-struct compr_quantities *
-compr_quantities_allocate(size_t nc, size_t nf, int np);
-
-void
-compr_quantities_deallocate(struct compr_quantities *cq);
-
 void
 compr_flux_term(grid_t       *G,
                 const double *fflux,