diff --git a/R/layers.R b/R/layers.R
index 90b32fbd5..4fd49e4d4 100644
--- a/R/layers.R
+++ b/R/layers.R
@@ -532,6 +532,11 @@ safeLabel <- function(label, data) {
   }
 
   label <- evalFormula(label, data)
+
+  if(length(label) == 0) {
+    return(label)
+  }
+  
  if (
     ! (
       inherits(label, "html") ||