diff --git a/DESCRIPTION b/DESCRIPTION
index abe75581..15021328 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: pomp
 Type: Package
 Title: Statistical Inference for Partially Observed Markov Processes
-Version: 5.4.3.2
-Date: 2023-11-30
+Version: 5.4.3.3
+Date: 2023-12-01
 Authors@R: c(person(given=c("Aaron","A."),family="King",role=c("aut","cre"),email="kingaa@umich.edu",comment=c(ORCID="0000-0001-6159-3207")),
 	  person(given=c("Edward","L."),family="Ionides",role="aut",comment=c(ORCID="0000-0002-4190-0174"))	,
 	  person(given="Carles",family="Bretó",role="aut",comment=c(ORCID="0000-0003-4695-4902")),
diff --git a/R/templates.R b/R/templates.R
index c5a791c0..f3d27663 100644
--- a/R/templates.R
+++ b/R/templates.R
@@ -19,33 +19,19 @@ pomp_templates <- list(
   ),
   utilities=list(
     bspline_basis=list(
-      trigger=r"{(?<!periodic_)bspline_basis_eval(?!_deriv)}",
-      header=r"{
-static bspline_basis_eval_t *__pomp_bspline_basis_eval;
-#define bspline_basis_eval(X,K,P,N,Y)  (__pomp_bspline_basis_eval((X),(K),(P),(N),(Y)))}",
-      reg=r"{
-  __pomp_bspline_basis_eval = (bspline_basis_eval_t *) R_GetCCallable("pomp","bspline_basis_eval");}"
-    ),
-    bspline_basis_deriv=list(
-      trigger=r"{(?<!periodic_)bspline_basis_eval_deriv}",
+      trigger=r"{(?<!periodic_)bspline_basis_eval}",
       header=r"{
 static bspline_basis_eval_deriv_t *__pomp_bspline_basis_eval_deriv;
+#define bspline_basis_eval(X,K,P,N,Y)  (__pomp_bspline_basis_eval_deriv((X),(K),(P),(N),0,(Y)))
 #define bspline_basis_eval_deriv(X,K,P,N,D,Y)  (__pomp_bspline_basis_eval_deriv((X),(K),(P),(N),(D),(Y)))}",
       reg=r"{
   __pomp_bspline_basis_eval_deriv = (bspline_basis_eval_deriv_t *) R_GetCCallable("pomp","bspline_basis_eval_deriv");}"
     ),
     periodic_bspline_basis=list(
-      trigger="periodic_bspline_basis_eval(?!_deriv)",
-      header=r"{
-static periodic_bspline_basis_eval_t *__pomp_periodic_bspline_basis_eval;
-#define periodic_bspline_basis_eval(X,T,P,N,Y)  (__pomp_periodic_bspline_basis_eval((X),(T),(P),(N),(Y)))}",
-      reg=r"{
-  __pomp_periodic_bspline_basis_eval = (periodic_bspline_basis_eval_t *) R_GetCCallable("pomp","periodic_bspline_basis_eval");}"
-    ),
-    periodic_bspline_basis_deriv=list(
-      trigger="periodic_bspline_basis_eval_deriv",
+      trigger="periodic_bspline_basis_eval",
       header=r"{
 static periodic_bspline_basis_eval_deriv_t *__pomp_periodic_bspline_basis_eval_deriv;
+#define periodic_bspline_basis_eval(X,T,P,N,Y)  (__pomp_periodic_bspline_basis_eval_deriv((X),(T),(P),(N),0,(Y)))
 #define periodic_bspline_basis_eval_deriv(X,T,P,N,D,Y)  (__pomp_periodic_bspline_basis_eval_deriv((X),(T),(P),(N),(D),(Y)))}",
       reg=r"{
   __pomp_periodic_bspline_basis_eval_deriv = (periodic_bspline_basis_eval_deriv_t *) R_GetCCallable("pomp","periodic_bspline_basis_eval_deriv");}"
diff --git a/inst/include/pomp.h b/inst/include/pomp.h
index ea86fe02..d3347d90 100644
--- a/inst/include/pomp.h
+++ b/inst/include/pomp.h
@@ -21,20 +21,11 @@
 #define err(...) errorcall(R_NilValue,__VA_ARGS__)
 #define warn(...) warningcall(R_NilValue,__VA_ARGS__)
 
-typedef
-void bspline_basis_eval_t
-(double x, double *knots, int degree, int nbasis, double *y);
-
 typedef
 void bspline_basis_eval_deriv_t
 (double x, double *knots, int degree,
  int nbasis, int deriv, double *y);
 
-typedef
-void periodic_bspline_basis_eval_t
-(double x, double period, int degree,
- int nbasis, double *y);
-
 typedef
 void periodic_bspline_basis_eval_deriv_t
 (double x, double period, int degree,
diff --git a/src/bspline.c b/src/bspline.c
index b32c372c..17a31e0f 100644
--- a/src/bspline.c
+++ b/src/bspline.c
@@ -105,15 +105,12 @@ SEXP periodic_bspline_basis (SEXP x, SEXP nbasis, SEXP degree, SEXP period,
   return y;
 }
 
-// The following function computes value at x of all the nbasis
-// B-spline basis functions of the specified degree with the given knots.
+// The following function computes value at x of all the
+// nbasis B-spline basis functions of
+// the specified degree with the given knots.
+// If deriv>0, the deriv-order derivative is given.
 // 'knots' must point to an array of length nbasis+degree+1
 // The results are stored in y.
-void bspline_basis_eval (double x, double *knots, int degree,
-                         int nbasis, double *y) {
-  bspline_basis_eval_deriv(x,knots,degree,nbasis,0,y);
-}
-
 void bspline_basis_eval_deriv (double x, double *knots, int degree,
                                int nbasis, int deriv, double *y) {
   for (int i = 0; i < nbasis; i++) {
@@ -121,11 +118,6 @@ void bspline_basis_eval_deriv (double x, double *knots, int degree,
   }
 }
 
-void periodic_bspline_basis_eval (double x, double period, int degree,
-                                  int nbasis, double *y) {
-  periodic_bspline_basis_eval_deriv(x,period,degree,nbasis,0,y);
-}
-
 void periodic_bspline_basis_eval_deriv (double x, double period, int degree,
                                         int nbasis, int deriv, double *y)
 {
diff --git a/src/decls.h b/src/decls.h
index 287c689b..1b2a3f9c 100644
--- a/src/decls.h
+++ b/src/decls.h
@@ -2,9 +2,7 @@
 extern void bspline_eval(double *y, const double *x, int nx, int i, int degree, int deriv, const double *knots);
 extern SEXP bspline_basis(SEXP range, SEXP x, SEXP nbasis, SEXP degree, SEXP deriv);
 extern SEXP periodic_bspline_basis(SEXP x, SEXP nbasis, SEXP degree, SEXP period, SEXP deriv);
-extern void bspline_basis_eval(double x, double *knots, int degree, int nbasis, double *y);
 extern void bspline_basis_eval_deriv(double x, double *knots, int degree, int nbasis, int deriv, double *y);
-extern void periodic_bspline_basis_eval(double x, double period, int degree, int nbasis, double *y);
 extern void periodic_bspline_basis_eval_deriv(double x, double period, int degree, int nbasis, int deriv, double *y);
 /* src/dinit.c */
 extern SEXP do_dinit(SEXP object, SEXP t0, SEXP x, SEXP params, SEXP log, SEXP gnsi);
diff --git a/src/init.c b/src/init.c
index a5ba02c1..07f7edf8 100644
--- a/src/init.c
+++ b/src/init.c
@@ -52,9 +52,7 @@ static const R_CallMethodDef callMethods[] = {
 
 void R_init_pomp (DllInfo *info) {
   // C functions provided for users
-  R_RegisterCCallable("pomp","bspline_basis_eval",(DL_FUNC) &bspline_basis_eval);
   R_RegisterCCallable("pomp","bspline_basis_eval_deriv",(DL_FUNC) &bspline_basis_eval_deriv);
-  R_RegisterCCallable("pomp","periodic_bspline_basis_eval",(DL_FUNC) &periodic_bspline_basis_eval);
   R_RegisterCCallable("pomp","periodic_bspline_basis_eval_deriv",(DL_FUNC) &periodic_bspline_basis_eval_deriv);
   R_RegisterCCallable("pomp","bspline_eval",(DL_FUNC) &bspline_eval); /* DEPRECATED */
   R_RegisterCCallable("pomp","get_userdata",(DL_FUNC) &get_userdata);
diff --git a/src/pomp.h b/src/pomp.h
index ea86fe02..d3347d90 100644
--- a/src/pomp.h
+++ b/src/pomp.h
@@ -21,20 +21,11 @@
 #define err(...) errorcall(R_NilValue,__VA_ARGS__)
 #define warn(...) warningcall(R_NilValue,__VA_ARGS__)
 
-typedef
-void bspline_basis_eval_t
-(double x, double *knots, int degree, int nbasis, double *y);
-
 typedef
 void bspline_basis_eval_deriv_t
 (double x, double *knots, int degree,
  int nbasis, int deriv, double *y);
 
-typedef
-void periodic_bspline_basis_eval_t
-(double x, double period, int degree,
- int nbasis, double *y);
-
 typedef
 void periodic_bspline_basis_eval_deriv_t
 (double x, double period, int degree,