diff --git a/phosphor-regulators/src/actions/pmbus_write_vout_command_action.cpp b/phosphor-regulators/src/actions/pmbus_write_vout_command_action.cpp
index 238e2f2..2a245a9 100644
--- a/phosphor-regulators/src/actions/pmbus_write_vout_command_action.cpp
+++ b/phosphor-regulators/src/actions/pmbus_write_vout_command_action.cpp
@@ -81,8 +81,7 @@
         ss << "volts: " << volts.value() << ", ";
     }
 
-    // Only linear format is currently supported
-    ss << "format: linear";
+    ss << "format: " << pmbus_utils::toString(format);
 
     if (exponent.has_value())
     {