diff --git a/segment-shellvar.go b/segment-shellvar.go
index 20f4c1b3..d18da205 100644
--- a/segment-shellvar.go
+++ b/segment-shellvar.go
@@ -11,7 +11,9 @@ func segmentShellVar(p *powerline) []pwl.Segment {
 	varContent, varExists := os.LookupEnv(shellVarName)
 
 	if !varExists {
-		warn("Shell variable " + shellVarName + " does not exist.")
+		if shellVarName != "" {
+			warn("Shell variable " + shellVarName + " does not exist.")
+		}
 		return []pwl.Segment{}
 	}