diff --git a/nifty_gridder.cc b/nifty_gridder.cc
index 4cc3aab6aa901ee06499d4fa5636f9017bf99a57..c84f07b19ef684c20ee3f041e260d34350bea50b 100644
--- a/nifty_gridder.cc
+++ b/nifty_gridder.cc
@@ -329,9 +329,9 @@ class PyGridderConfig: public GridderConfig
       }
     py::array apply_taper(const py::array &img, bool divide) const
       {
-      if (isPytype<complex<float>>(img))
+      if (isPytype<float>(img))
         return apply_taper2<float>(img, divide);
-      if (isPytype<complex<double>>(img))
+      if (isPytype<double>(img))
         return apply_taper2<double>(img, divide);
       myfail("type matching failed: 'img' has neither type 'f4' nor 'f8'");
       }