diff -up codec2-1.0.0/src/gp_interleaver.c.aaaa codec2-1.0.0/src/gp_interleaver.c
--- codec2-1.0.0/src/gp_interleaver.c.aaaa	2021-08-15 21:49:47.062641389 +0200
+++ codec2-1.0.0/src/gp_interleaver.c	2021-08-15 21:50:14.712490217 +0200
@@ -65,6 +65,7 @@ int choose_interleaver_b(int Nbits)
 
     fprintf(stderr, "gp_interleaver: Nbits: %d, b not found!\n", Nbits);
     assert(0);
+    return(0);
 }