diff --git a/src/codec.rs b/src/codec.rs
index 3660680..bea952f 100644
--- a/src/codec.rs
+++ b/src/codec.rs
@@ -143,7 +143,7 @@ mod tests {
     };
 
     range_param!(RangeParam(0..=15): u8);
-    range_response!(RangeParam => ParamError : Invalid("invalid"));
+    range_response!(RangeParam => ParamError::Invalid("invalid"));
 
     command!(b"CMD": SimpleCommand);
     command!(b"CMD": ResponseCommand => RangeParam);
diff --git a/src/command/bc125at/battery_charge_time.rs b/src/command/bc125at/battery_charge_time.rs
index 2d87bed..ada0d07 100644
--- a/src/command/bc125at/battery_charge_time.rs
+++ b/src/command/bc125at/battery_charge_time.rs
@@ -1,7 +1,7 @@
 use crate::command::{OkResponse, command, range_param, range_response};
 
 range_param!(BatteryChargeTime(1..=16): u8);
-range_response!(BatteryChargeTime => BatteryChargeTimeError : InvalidBatteryChargeTime("volume must be between [1..16], got `{0}`"));
+range_response!(BatteryChargeTime => BatteryChargeTimeError::InvalidBatteryChargeTime("volume must be between [1..16], got `{0}`"));
 
 command!(b"BSV": GetBatteryInfo => BatteryChargeTime);
 command!(b"BSV": SetBatteryInfo(BatteryChargeTime) => OkResponse);
diff --git a/src/command/bc125at/lcd_contrast.rs b/src/command/bc125at/lcd_contrast.rs
index f40a74e..a1044de 100644
--- a/src/command/bc125at/lcd_contrast.rs
+++ b/src/command/bc125at/lcd_contrast.rs
@@ -1,7 +1,7 @@
 use crate::command::{OkResponse, command, range_param, range_response};
 
 range_param!(LcdContrast(0..=15): u8);
-range_response!(LcdContrast => LcdContrastError : InvalidLcdContrast("LCD contrast must be between [1..15], got `{0}`"));
+range_response!(LcdContrast => LcdContrastError::InvalidLcdContrast("LCD contrast must be between [1..15], got `{0}`"));
 
 command!(b"CNT": GetLcdContrast => LcdContrast);
 command!(b"CNT": SetLcdContrast(LcdContrast) => OkResponse);
diff --git a/src/command/bc125at/squelch.rs b/src/command/bc125at/squelch.rs
index 5b02d80..b77dd99 100644
--- a/src/command/bc125at/squelch.rs
+++ b/src/command/bc125at/squelch.rs
@@ -1,7 +1,7 @@
 use crate::command::{OkResponse, command, range_param, range_response};
 
 range_param!(SquelchLevel(0..=15): u8);
-range_response!(SquelchLevel => SquelchLevelError : InvalidSquelch("squelch must be between [0..15], got `{0}`"));
+range_response!(SquelchLevel => SquelchLevelError::InvalidSquelch("squelch must be between [0..15], got `{0}`"));
 
 command!(b"SQL": GetSquelchLevel => SquelchLevel);
 command!(b"SQL": SetSquelchLevel(SquelchLevel) => OkResponse);
diff --git a/src/command/bc125at/volume.rs b/src/command/bc125at/volume.rs
index b9be9e9..f414a21 100644
--- a/src/command/bc125at/volume.rs
+++ b/src/command/bc125at/volume.rs
@@ -1,7 +1,7 @@
 use crate::command::{OkResponse, command, range_param, range_response};
 
 range_param!(VolumeLevel(0..=15): u8);
-range_response!(VolumeLevel => VolumeLevelError : InvalidVolume("volume must be between [0..15], got `{0}`"));
+range_response!(VolumeLevel => VolumeLevelError::InvalidVolume("volume must be between [0..15], got `{0}`"));
 
 command!(b"VOL": GetVolumeLevel => VolumeLevel);
 command!(b"VOL": SetVolumeLevel(VolumeLevel) => OkResponse);
diff --git a/src/command/macros/command.rs b/src/command/macros/command.rs
index 06163cd..9fc27f8 100644
--- a/src/command/macros/command.rs
+++ b/src/command/macros/command.rs
@@ -52,7 +52,7 @@ mod tests {
     };
 
     range_param!(RangeParam(0..=15): u8);
-    range_response!(RangeParam => ParamError : Invalid("invalid"));
+    range_response!(RangeParam => ParamError::Invalid("invalid"));
 
     #[test]
     fn no_params_ok_response() {
diff --git a/src/command/macros/range_response.rs b/src/command/macros/range_response.rs
index 5016410..dc794fb 100644
--- a/src/command/macros/range_response.rs
+++ b/src/command/macros/range_response.rs
@@ -1,5 +1,5 @@
 macro_rules! range_response {
-    ($name:ty => $error:ident : $invalid_variant:ident($msg:literal)) => {
+    ($name:ty => $error:ident::$invalid_variant:ident($msg:literal)) => {
         #[derive(::core::fmt::Debug, ::thiserror::Error)]
         pub enum $error {
             #[error(transparent)]
@@ -35,7 +35,7 @@ mod tests {
     use crate::command::{Response, range_param, test::deserialize};
 
     range_param!(U8RangeParam(0..=10): u8);
-    range_response!(U8RangeParam => ParamError : Invalid("invalid"));
+    range_response!(U8RangeParam => ParamError::Invalid("invalid"));
 
     #[test]
     fn expected_field_count() {