diff --git a/programs/pkey/rsa_genkey.c b/programs/pkey/rsa_genkey.c
index f92c50b..7711776 100644
--- a/programs/pkey/rsa_genkey.c
+++ b/programs/pkey/rsa_genkey.c
@@ -150,6 +150,7 @@
         fclose( fpriv );
 
     rsa_free( &rsa );
+    entropy_free( &entropy );
 
 #if defined(_WIN32)
     printf( "  Press Enter to exit this program.\n" );