diff --git a/workflow/main.nf b/workflow/main.nf
index 818d94934f6e24cfee873eb730005367da744260..188d6430807a2c5cee837f3080f40012893746be 100644
--- a/workflow/main.nf
+++ b/workflow/main.nf
@@ -405,7 +405,7 @@ process peakAnnotation {
 }
 
 // Define channel to find number of unique experiments
-peaksDesign = uniqueExperiments.readLines().size()
+peaksDesign = uniqueExperiments.size()
 
 // Calculate Differential Binding Activity
 process diffPeaks {