diff --git a/Firmware/la10compat.cpp b/Firmware/la10compat.cpp
index 5b851bc3..9f0d5e5f 100644
--- a/Firmware/la10compat.cpp
+++ b/Firmware/la10compat.cpp
@@ -37,7 +37,7 @@ void la10c_mode_change(LA10C_MODE mode)
 // Approximate a LA10 value to a LA15 equivalent.
 static float la10c_convert(float k)
 {
-    float new_K = k * 0.004 - 0.06;
+    float new_K = k * 0.004 - 0.05;
     return (new_K < 0? 0: new_K);
 }