diff --git a/R/constructNWISURL.r b/R/constructNWISURL.r
index 40235cd9c61a06cf9f23b98e0c713ff5be6088ab..75f9182878d45033b5c7b6d2646773e6626b1dce 100644
--- a/R/constructNWISURL.r
+++ b/R/constructNWISURL.r
@@ -138,7 +138,7 @@ constructNWISURL <- function(siteNumber,parameterCd,startDate,endDate,service,st
             url <- paste(url,"&startDT=",startDate,sep="")
           } else {
             startorgin <- "1851-01-01"
-            if ("uv" == service) startorgin <- "1900-01-01"            
+            if ("iv" == service) startorgin <- "1900-01-01"            
             url <- paste(url,"&startDT=",startorgin,sep="")
           }