diff --git a/Changelog.txt b/Changelog.txt
index e4976f267..57cb70608 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -1,3 +1,8 @@
+Release 16.12.1 (pending)
+==========================
+
+- Fix abs() overload for mcu lms7002m calibrations
+
 Release 16.12.0 (2016-12-31)
 ==========================
 
diff --git a/mcu_program/common_src/lms7002m_calibrations.c b/mcu_program/common_src/lms7002m_calibrations.c
index 10b13518b..f2c3386e6 100644
--- a/mcu_program/common_src/lms7002m_calibrations.c
+++ b/mcu_program/common_src/lms7002m_calibrations.c
@@ -65,7 +65,7 @@ static uint8_t toDCOffset(const int8_t offset)
 {
     if(offset >= 0)
         return offset;
-    return abs(offset) | 0x40;
+    return (uint8_t)(abs((int)offset) | 0x40);
 }
 
 static void FlipRisingEdge(const uint16_t addr, const uint8_t bits)