diff --git a/src/libraries/icubmod/embObjMais/embObjMais.cpp b/src/libraries/icubmod/embObjMais/embObjMais.cpp
index 87ef54d7da..0220d7c8d9 100755
--- a/src/libraries/icubmod/embObjMais/embObjMais.cpp
+++ b/src/libraries/icubmod/embObjMais/embObjMais.cpp
@@ -554,6 +554,7 @@ bool embObjMais::getEncoderArrayMeasure(size_t sens_index, yarp::sig::Vector& ou
 }
 
 size_t embObjMais::getEncoderArraySize(size_t sens_index) const {
+    if (sens_index >= 1) return 0;
     return analogdata.size();
 }