Index: firmware/App/Controllers/DialInFlow.c
===================================================================
diff -u -r3d409ee7130063937dce719281bb072c87023d3f -r85f1940ac2b4b76181ca364693332c2ae276f2ba
--- firmware/App/Controllers/DialInFlow.c	(.../DialInFlow.c)	(revision 3d409ee7130063937dce719281bb072c87023d3f)
+++ firmware/App/Controllers/DialInFlow.c	(.../DialInFlow.c)	(revision 85f1940ac2b4b76181ca364693332c2ae276f2ba)
@@ -1070,11 +1070,12 @@
 {
     U32 err_persist_time = HEX_32_BIT_FULL_SCALE;  // 49 days
     U32 temporaryPersistentTimeout = 10 * MS_PER_SECOND;
+    F32 absMotRPM = fabs( mtr_rpm );
 
-    if ( mtr_rpm > 0 )
+    if ( absMotRPM > NEARLY_ZERO )
     {
         /// Calculate persist time for rotor speed error condition.
-        err_persist_time = ( ( DIP_ROTOR_ERROR_PERSIST_ROTATION_MIN / ( mtr_rpm / gear_ratio / SEC_PER_MIN ) ) * MS_PER_SECOND );
+        err_persist_time = ( ( (F32)DIP_ROTOR_ERROR_PERSIST_ROTATION_MIN / ( absMotRPM / gear_ratio / (F32)SEC_PER_MIN ) ) * (F32)MS_PER_SECOND );
     }
 
    return err_persist_time + temporaryPersistentTimeout;