diff --git a/pll/pll_bypass.v b/pll/pll_bypass.v
index 30bff07..11e85be 100644
--- a/pll/pll_bypass.v
+++ b/pll/pll_bypass.v
@@ -1,7 +1,7 @@
 module pll(
   input  clki,
-  output clko,
-  output lock
+  output reg clko,
+  output reg lock
 );
 
   always @* begin