diff --git a/samples/tutorials/control/auto_exposure.cc b/samples/tutorials/control/auto_exposure.cc
index f1f5c13..efe77e6 100644
--- a/samples/tutorials/control/auto_exposure.cc
+++ b/samples/tutorials/control/auto_exposure.cc
@@ -29,7 +29,7 @@ int main(int argc, char *argv[]) {
   // auto-exposure: 0
   api->SetOptionValue(Option::EXPOSURE_MODE, 0);
 
-  // max_gain: range [0.48], default 48
+  // max_gain: range [0,48], default 48
   api->SetOptionValue(Option::MAX_GAIN, 48);
   // max_exposure_time: range [0,240], default 240
   api->SetOptionValue(Option::MAX_EXPOSURE_TIME, 240);
diff --git a/samples/tutorials/control/manual_exposure.cc b/samples/tutorials/control/manual_exposure.cc
index 12aef0e..38afa32 100644
--- a/samples/tutorials/control/manual_exposure.cc
+++ b/samples/tutorials/control/manual_exposure.cc
@@ -29,7 +29,7 @@ int main(int argc, char *argv[]) {
   // manual-exposure: 1
   api->SetOptionValue(Option::EXPOSURE_MODE, 1);
 
-  // gain: range [0.48], default 24
+  // gain: range [0,48], default 24
   api->SetOptionValue(Option::GAIN, 24);
   // brightness/exposure_time: range [0,240], default 120
   api->SetOptionValue(Option::BRIGHTNESS, 120);