diff --git a/techlibs/fabulous/prims.v b/techlibs/fabulous/prims.v
index 8ddae5beb..bd0af906a 100644
--- a/techlibs/fabulous/prims.v
+++ b/techlibs/fabulous/prims.v
@@ -93,13 +93,13 @@ module Global_Clock (output CLK);
 endmodule
 
 (* blackbox, keep *)
-module InPass4_frame_config (output O0, O1, O2, O3);
+module InPass4_frame_config (input CLK, output O0, O1, O2, O3);
 
 endmodule
 
 
 (* blackbox, keep *)
-module OutPass4_frame_config (input I0, I1, I2, I3);
+module OutPass4_frame_config (input CLK, I0, I1, I2, I3);
 
 endmodule
 
@@ -414,4 +414,4 @@ module LUTFF_ESS (
         O <= D;
     end
 endmodule
-`endif // COMPLEX_DFF
\ No newline at end of file
+`endif // COMPLEX_DFF