diff --git a/prog.go b/prog.go
index a5e78d2c2..f4f3af7c3 100644
--- a/prog.go
+++ b/prog.go
@@ -659,7 +659,7 @@ type RunOptions struct {
 }
 
 // Test runs the Program in the kernel with the given input and returns the
-// value returned by the eBPF program. outLen may be zero.
+// value returned by the eBPF program.
 //
 // Note: the kernel expects at least 14 bytes input for an ethernet header for
 // XDP and SKB programs.