diff --git a/src/htu21d/javaupm_htu21d.i b/src/htu21d/javaupm_htu21d.i
index 14a87158..b51e7fcf 100644
--- a/src/htu21d/javaupm_htu21d.i
+++ b/src/htu21d/javaupm_htu21d.i
@@ -2,9 +2,7 @@
 %include "../upm.i"
 %include "typemaps.i"
 
-%apply float *OUTPUT {float *fHum};
-%apply float *OUTPUT {float *fHumTemp};
-%apply float *OUTPUT {float *fDewPt};
+%ignore getHumidityData(float*, float*, float*);
 
 %{
     #include "htu21d.hpp"