Introduced entropy_free()
diff --git a/programs/random/gen_random_ctr_drbg.c b/programs/random/gen_random_ctr_drbg.c
index fcdc2ee..32b8521 100644
--- a/programs/random/gen_random_ctr_drbg.c
+++ b/programs/random/gen_random_ctr_drbg.c
@@ -111,6 +111,7 @@
     printf("\n");
 
     fclose( f );
+    entropy_free( &entropy );
 
     return( ret );
 }