diff --git a/lib/fsk4hf/ldpcsim174_74.f90 b/lib/fsk4hf/ldpcsim174_74.f90
index 6969b3524..3654bbba7 100644
--- a/lib/fsk4hf/ldpcsim174_74.f90
+++ b/lib/fsk4hf/ldpcsim174_74.f90
@@ -2,7 +2,6 @@ program ldpcsim174_74
 
 ! End-to-end test of the (174,74)/crc24 encoder and decoders.
 
-   use crc
    use packjt77
 
    parameter(N=174, K=74, M=N-K)