diff --git a/src/data/SpikeGen.cpp b/src/data/SpikeGen.cpp
index 91b1ec433c6a56c9097b7b693c05bc3f5cec4f2f..eecd6c86ebcdc7d3ce52ebf6513305364a7737b2 100644
--- a/src/data/SpikeGen.cpp
+++ b/src/data/SpikeGen.cpp
@@ -15,7 +15,7 @@
 #include "aidge/data/Spikegen.hpp"
 
 namespace Aidge {
-Tensor rateConvert(const Tensor& tensor) {
+static Tensor rateConvert(const Tensor& tensor) {
 
     auto result = tensor.clone();