diff --git a/asymptote/gsl.cc b/asymptote/gsl.cc
index cfb6a5a..b858339 100644
--- a/asymptote/gsl.cc
+++ b/asymptote/gsl.cc
@@ -1088,7 +1088,7 @@ void gen_rungsl_venv(venv &ve)
   addGSLDOUBLE2Func<gsl_sf_ellint_F>(SYM(F));
   addGSLDOUBLE2Func<gsl_sf_ellint_E>(SYM(E));
   addGSLDOUBLE3Func<gsl_sf_ellint_P>(SYM(P),SYM(phi),SYM(k),SYM(n));
-  addGSLDOUBLE3Func<gsl_sf_ellint_D>(SYM(D),SYM(phi),SYM(k),SYM(n));
+  addGSLDOUBLE2Func<gsl_sf_ellint_D>(SYM(D),SYM(phi),SYM(k));
   addGSLDOUBLE2Func<gsl_sf_ellint_RC>(SYM(RC),SYM(x),SYM(y));
   addGSLDOUBLE3Func<gsl_sf_ellint_RD>(SYM(RD),SYM(x),SYM(y),SYM(z));
   addGSLDOUBLE3Func<gsl_sf_ellint_RF>(SYM(RF),SYM(x),SYM(y),SYM(z));