diff --git a/src/Oversampling.cpp b/src/Oversampling.cpp
index 3bd53b5..fd82d60 100644
--- a/src/Oversampling.cpp
+++ b/src/Oversampling.cpp
@@ -9,7 +9,7 @@
 
 Oversampling::Oversampling(int adcbytes, int samplebytes, int Averaging)
 {
-  _samplebytes = constrain(samplebytes, 11, 24);
+  _samplebytes = constrain(samplebytes, 11, 18);
   _adcbytes = constrain(adcbytes, 10, 12);
   if (Averaging < 1){
     Averaging = 1;