Index: firmware/App/Modes/ModeTreatment.c
===================================================================
diff -u -re0e66d4c302c2aa43951ca316689ed4debbff1fb -rd3ae2d91603ae6d2d25b9abdb220cc144cf90692
--- firmware/App/Modes/ModeTreatment.c	(.../ModeTreatment.c)	(revision e0e66d4c302c2aa43951ca316689ed4debbff1fb)
+++ firmware/App/Modes/ModeTreatment.c	(.../ModeTreatment.c)	(revision d3ae2d91603ae6d2d25b9abdb220cc144cf90692)
@@ -356,7 +356,7 @@
 BOOL verifyTreatmentDurationSettingChange( U32 treatmentTime )
 {
     BOOL result = FALSE;
-    U32 timeDiff = 0;
+    S32 timeDiff = 0;
     F32 rateDiff = 0.0;
     OP_MODE currMode = getCurrentOperationMode();
 
@@ -396,7 +396,7 @@
 BOOL verifyUFSettingsChange( F32 uFVolume, UF_ADJ_T adjustment )
 {
     BOOL result = FALSE;
-    U32 timeDiff = 0;
+    S32 timeDiff = 0;
     F32 rateDiff = 0.0;
     OP_MODE currMode = getCurrentOperationMode();